We’ve all been there – craving something sweet that hits just the right spot between crunchy and chewy. That’s exactly what makes Mars Bar Slice such an irresistible treat. This beloved Australian dessert transforms the classic Mars chocolate bar into a decadent slice that’s perfect for sharing (though we won’t judge if you don’t).
What makes this recipe absolutely brilliant is how it combines the familiar flavors of chocolate, caramel, and nougat into one spectacular dessert. The base provides a satisfying crunch while the Mars bar layer delivers that signature gooey sweetness we all crave. Top it off with smooth chocolate and you’ve got a showstopper that’ll disappear from your kitchen faster than you can say “seconds please.”
Whether you’re planning a bake sale, need a crowd-pleasing dessert, or simply want to elevate your afternoon tea game, this Mars Bar Slice delivers every single time. It’s surprisingly simple to make and guaranteed to become your new go-to recipe.
Ingredients
We’ve carefully selected each ingredient to create the perfect balance of textures and flavors in our Mars Bar Slice. These simple pantry staples combine to deliver that irresistible combination of crunchy base and indulgent chocolate topping.
For the Base
- 1 cup plain flour
- 1/2 cup rolled oats
- 1/2 cup brown sugar, firmly packed
- 1/2 cup desiccated coconut
- 125g butter, melted
- 2 tablespoons golden syrup
For the Topping
- 4 Mars Bars (60g each), roughly chopped
- 2 tablespoons milk
- 200g dark chocolate, chopped
- 2 tablespoons vegetable oil
Equipment Needed
Creating our Mars Bar Slice requires minimal kitchen equipment that most home bakers already have on hand. We’ll need a few essential tools to ensure our slice turns out perfectly every time.
Baking Tin serves as our foundation for this recipe. We recommend using a rectangular or square slice tin measuring approximately 18cm x 22cm or 27cm x 17cm. The tin should be greased thoroughly and lined with baking paper to prevent sticking and ensure easy removal of our finished slice.
Mixing Bowl becomes essential for combining our ingredients effectively. A medium to large bowl works best to accommodate all the Rice Krispies and melted Mars Bar mixture without spillage during the mixing process.
Saucepan or Microwave provides the heat source for melting our ingredients. We can choose either method based on personal preference and kitchen setup. A heavy bottomed saucepan distributes heat evenly while a microwave offers quick convenience.
Metal or Wooden Spoon helps us stir the melted chocolate and combine ingredients without scratching our cookware. We prefer wooden spoons for their gentle nature on non stick surfaces.
Small Whisk offers optional assistance when handling the golden syrup mixture. This tool helps incorporate ingredients smoothly and prevents lumps from forming in our base layer.
The beauty of this recipe lies in its simplicity. We don’t need specialized equipment or professional grade tools to achieve bakery quality results in our own kitchen.
Instructions
Now that we have our ingredients ready and equipment prepared, let’s walk through the simple steps to create this irresistible Mars Bar Slice. These instructions will guide you through each layer to achieve the perfect texture and flavor balance.
Prep the Pan
We start by lining our rectangular slice tin (approximately 18 cm x 22 cm or 27 cm x 19 cm) with baking paper. This preparation step ensures easy removal of the slice once it’s completely set. Make sure the baking paper extends slightly over the edges to create handles for lifting.
Make the Base
Place 150 g to 200 g of chopped Mars Bars and 50 g to 75 g of butter in a saucepan over low heat. We stir continuously until the Mars Bars melt completely and combine smoothly with the butter. Alternatively, we can use a microwave-safe bowl and melt the mixture on low heat in 30-second intervals.
Next, we incorporate 1 tablespoon (20g) of golden syrup into the melted mixture for enhanced flavor depth. The golden syrup adds extra sweetness and helps bind our ingredients together.
Finally, we stir in 3 cups (about 90g) of rice bubbles or Rice Krispies until every piece is coated with the Mars Bar mixture. The mixture will become quite sticky at this stage, which is exactly what we want for proper binding.
Prepare the Mars Bar Layer
We press the sticky Mars Bar mixture firmly into our prepared tin using clean hands or the back of a spoon. Even distribution across the entire surface ensures consistent texture in every bite. Smooth out the top surface and make sure the mixture reaches all corners and edges of the tin.
Add the Chocolate Topping
We melt 200 g to 250 g of milk chocolate in a microwave-safe bowl using short 20-30 second intervals. Stirring between each heating cycle prevents the chocolate from burning and ensures a smooth, glossy finish.
Once our chocolate reaches a silky consistency, we pour it over the Mars Bar layer immediately. Using a spatula or the back of a spoon, we spread the chocolate evenly to cover the entire surface. For extra visual appeal, we can arrange thin slices of additional Mars Bars across the chocolate layer as decoration.
We refrigerate the completed slice for a minimum of 3 to 4 hours, though overnight chilling produces the best results. Before cutting, we remove the slice from the refrigerator and let it sit at room temperature for 30 minutes. Using a warm serrated knife, we cut clean squares that showcase all the delicious layers.
Directions for Cooling and Setting
Proper cooling and setting transforms our Mars Bar Slice from a warm mixture into a perfectly sliceable dessert. We need to follow exact timing and temperature guidelines to achieve the best results.
Initial Cooling Phase
After spreading the chocolate topping evenly across our slice, we place the entire tin in the refrigerator immediately. The chocolate layer requires 15 to 30 minutes of refrigeration to set partially before we can proceed with cutting.
| Setting Stage | Time Required | Temperature |
|---|---|---|
| Partial chocolate set | 15-30 minutes | Refrigerated |
| Full setting | 3-4 hours minimum | Refrigerated |
| Optimal setting | Overnight | Refrigerated |
Complete Setting Requirements
Our Mars Bar Slice needs a minimum of 3 to 4 hours in the refrigerator to set properly. Overnight refrigeration delivers the ideal texture and makes cutting much easier. We recommend planning ahead and allowing the full overnight setting time whenever possible.
Temperature Management for Cutting
Room temperature adjustment prevents cracking when we cut our slice. We remove the tin from the refrigerator and let it sit at room temperature for about 20 minutes before cutting. This brief warming period ensures our chocolate layer won’t crack under the knife pressure.
On particularly warm days, we place our slice in the refrigerator for about 30 minutes before applying the chocolate icing. Using a less cool shelf in the fridge helps the slice set without becoming too hard.
Setting the Chocolate Layer Correctly
We spread the melted chocolate topping to reach every corner of our slice while it’s still warm. The chocolate should not be completely set when we cut the slice to avoid unwanted cracking. Perfect timing means the chocolate feels firm but still yields slightly to gentle pressure.
Storage Guidelines
Our finished Mars Bar Slice stores beautifully in an airtight container in the refrigerator for up to one week. For longer storage, we can freeze individual pieces for up to two months. Cutting the slice before freezing makes serving much more convenient later.
Make-Ahead Instructions
Mars Bar Slice stands out as an ideal dessert for busy schedules because we can prepare it days before serving. Our favorite approach involves making the entire slice 2 to 3 days ahead of when we need it.
Timeline Planning
We recommend following this preparation schedule for best results:
| Preparation Stage | Timeline | Key Actions |
|---|---|---|
| Initial preparation | 2-3 days ahead | Complete entire recipe through chocolate topping |
| Setting phase | 3-4 hours minimum | Refrigerate for proper texture development |
| Optimal setting | Overnight | Allow full firming for easiest cutting |
| Final preparation | 20 minutes before serving | Remove from fridge to soften slightly |
Storage During Make-Ahead Period
Our testing shows that storing the prepared slice in an airtight container maintains optimal freshness. We place the container in the refrigerator where it stays perfectly fresh for up to one week. The chocolate topping retains its smooth appearance while the Mars Bar layer keeps its ideal chewy texture.
For longer advance preparation we freeze the slice for up to two months. We wrap individual portions in plastic wrap before placing them in freezer bags for portion control. This method allows us to remove only what we need for each occasion.
Quality Maintenance Tips
We avoid cutting the slice until serving day to prevent the layers from separating during storage. Instead we score light lines on the chocolate surface as cutting guides then complete the cuts when ready to serve.
Temperature control becomes crucial during the make-ahead period. We ensure our refrigerator maintains consistent cooling to prevent the chocolate from developing condensation or losing its glossy finish. The slice actually improves in flavor as the Mars Bar pieces soften slightly and meld with the rice bubble base.
Storage Tips
Proper storage keeps our Mars Bar Slice fresh and maintains its perfect texture for days to come. We recommend storing the finished slice in an airtight container in the refrigerator where it will stay fresh for up to one week.
Refrigerator Storage
The refrigerator provides the ideal environment for our Mars Bar Slice. Place the cut squares in an airtight container to prevent the chocolate from absorbing other flavors and to maintain the slice’s firm texture. Cool temperatures keep the Mars Bar layer from becoming too soft while preserving the crispy rice bubble base.
Freezer Storage for Extended Freshness
We can extend the storage life significantly by freezing our Mars Bar Slice. Cut the slice into individual squares before freezing to make serving easier later. Wrap each piece tightly in plastic wrap or place them in an airtight container to prevent freezer burn.
| Storage Method | Duration | Container Type |
|---|---|---|
| Refrigerator | Up to 1 week | Airtight container |
| Freezer | 1-2 months | Wrapped in plastic or airtight container |
Thawing and Serving
When we’re ready to enjoy our frozen Mars Bar Slice, we should thaw the desired portions in the refrigerator for about one hour. This gradual thawing process preserves the slice’s texture and prevents condensation from softening the chocolate coating too much.
Cutting and Handling Tips
For the cleanest cuts, we remove the slice from the refrigerator about 30 minutes before slicing. A small serrated knife works best to cut through both the chocolate layer and the rice cereal base without cracking. The slice needs a minimum of 3 to 4 hours to set properly, though overnight refrigeration produces the best results before cutting and serving.
Serving Suggestions
Mars Bar Slice transforms any gathering into a memorable occasion with its irresistible combination of textures and flavors. We love serving this dessert at morning teas where guests can enjoy generous squares alongside their favorite hot beverages. The rich sweetness pairs perfectly with coffee or tea creating a delightful contrast.
School lunchboxes become exciting when we pack individual portions wrapped in parchment paper. Children adore the chewy Mars Bar layer combined with the satisfying crunch of rice bubbles. These portable treats maintain their texture throughout the day making them ideal for packed lunches.
Special Occasion Presentations
| Event Type | Serving Style | Portion Size |
|---|---|---|
| Children’s Parties | Cut into fun shapes | 2-inch squares |
| Adult Gatherings | Elegant small squares | 1.5-inch pieces |
| Bake Sales | Individual wrapped portions | 2.5-inch squares |
| Gift Giving | Decorative boxes | 6-8 pieces per box |
Bake sales benefit tremendously from our Mars Bar Slice offerings. The no-bake nature means we can prepare large quantities without overwhelming our kitchen. Customers consistently choose these treats over traditional baked goods because of their unique texture and familiar Mars Bar flavor.
Gift presentations become effortless when we arrange squares in decorative tins or boxes lined with colorful tissue paper. Recipients appreciate homemade treats that travel well without losing their appeal. The slice maintains its structure during transport making it perfect for sharing with friends and family.
Afternoon tea services gain sophistication when we cut the slice into smaller elegant portions. Guests enjoy the manageable size that allows them to sample other treats without feeling overwhelmed. The rich flavors satisfy sweet cravings without requiring large servings.
We recommend storing individual portions in the refrigerator until serving time to maintain the perfect consistency. Room temperature serving allows the chocolate topping to soften slightly while keeping the Mars Bar layer pleasantly chewy.
Recipe Variations
We love experimenting with different candy bars and ingredients to create unique twists on this classic dessert. These variations allow you to customize the Mars Bar Slice to your taste preferences or dietary needs.
Different Candy Bar Options
Moro Bars serve as an excellent substitute when Mars Bars are unavailable or when they’re on sale at your local store. We find that Moro Bars provide a similar caramel and nougat combination that works beautifully in this recipe.
Snickers Bars add a delightful nutty crunch to the slice when chopped and used in place of Mars Bars. The peanuts create an interesting texture contrast against the smooth rice bubble base.
Milky Way Bars offer a lighter, fluffier nougat center that melts more easily during preparation. We recommend using these when you prefer a smoother, less chewy texture in your finished slice.
Mixed Candy Bars create an exciting flavor adventure by combining different types of bars in one batch. Try using half Mars Bars and half Snickers for a perfect balance of caramel sweetness and nutty satisfaction.
Healthier Alternatives
Dark Chocolate Topping reduces the overall sugar content while adding antioxidants to your dessert. We substitute milk chocolate with 70% dark chocolate for a more sophisticated flavor profile that adults particularly enjoy.
Reduced Sugar Candy Bars help lower the sweetness level when available at your grocery store. Look for bars labeled as having 30% less sugar to maintain the authentic taste while cutting calories.
Added Nuts and Seeds boost the nutritional value by incorporating almonds, walnuts, or sunflower seeds into the rice bubble mixture. We recommend adding 1/2 cup of chopped nuts to increase protein and healthy fats.
Coconut Oil Substitution replaces butter with a plant based alternative that provides similar binding properties. Use the same measurement as butter but ensure the coconut oil is at room temperature before mixing.
Brown Rice Crisps offer a whole grain option instead of traditional rice bubbles while maintaining the essential crunch factor. These provide additional fiber and nutrients without compromising the texture we love in this classic slice.
Troubleshooting Tips
Even the most experienced bakers encounter challenges when making Mars Bar Slice. We’ve compiled answers to the most common problems you might face during preparation.
Preventing Chocolate Cracking
Chocolate cracking on the surface is one of the most frequent issues. We recommend adding a small amount of coconut oil or vegetable oil to your melted chocolate before spreading it over the slice. This technique creates a more flexible chocolate layer that won’t crack when you cut through it. The oil maintains the chocolate’s glossy appearance while improving its texture.
Achieving Proper Setting Time
Patience is essential for perfect results. We suggest allowing your Mars Bar Slice to set in the refrigerator for at least 3 to 4 hours before cutting. Overnight refrigeration produces the best texture and makes cutting much easier. Your slice needs this time for the layers to bond properly and reach the ideal firmness.
Mastering Clean Cuts
Sharp knives make all the difference when slicing your dessert. We advise ensuring your slice is completely set before attempting to cut it. Room temperature slicing works better than cutting straight from the refrigerator. Let your slice sit at room temperature for 15 to 20 minutes before cutting to prevent the chocolate from shattering.
Fixing Mixture Consistency Issues
Your Mars Bar mixture might seem too wet or too dry during preparation. We find that adjusting the rice bubble quantity solves most consistency problems. Add more rice bubbles if your mixture appears too sticky or wet. Conversely, add a small amount of melted butter if your mixture seems too dry and won’t hold together.
Addressing Uneven Chocolate Coverage
Smooth chocolate topping requires proper melting technique. We recommend melting your chocolate slowly using low heat or short microwave intervals. Stir frequently to prevent overheating. Pour the melted chocolate while it’s still warm but not hot to ensure even spreading across the surface.
Managing Temperature Variations
Kitchen temperature affects your slice’s setting time and texture. We suggest working in a cool kitchen when possible. Hot weather or warm kitchens may require longer refrigeration times. Store your finished slice in the coldest part of your refrigerator to maintain optimal texture and prevent melting.
Conclusion
We’ve shared everything you need to create this beloved Australian treat that’s guaranteed to impress. The Mars Bar Slice delivers that perfect combination of textures and flavors we all crave – from the crispy rice bubble base to the gooey Mars Bar center and smooth chocolate topping.
What makes this dessert truly special is its foolproof nature. Whether you’re a beginner baker or seasoned pro you’ll find success with our detailed instructions and helpful troubleshooting tips.
The versatility of this slice means it’s ready for any occasion. Pack it for lunch boxes customize it with different candy bars or present it as a thoughtful homemade gift. With proper storage techniques you can even prepare it days ahead.
Now it’s time to gather your ingredients and start creating your own batch of this irresistible Mars Bar Slice. Your family and friends will thank you for it!
Frequently Asked Questions
What is Mars Bar Slice?
Mars Bar Slice is a popular Australian no-bake dessert that combines chocolate, caramel, and nougat flavors. It features a crunchy rice bubble base mixed with melted Mars Bars, topped with smooth chocolate. This sweet treat offers a perfect balance of textures and is ideal for various occasions like bake sales, afternoon tea, or casual gatherings.
How long does Mars Bar Slice take to set?
Mars Bar Slice requires a minimum of 3-4 hours to set initially, but overnight refrigeration is recommended for optimal texture. For best results, allow the slice to chill in the refrigerator for at least 8-12 hours. The chocolate topping needs adequate time to firm up completely before cutting into neat squares.
Can I make Mars Bar Slice ahead of time?
Yes, Mars Bar Slice is perfect for advance preparation. You can make it 2-3 days before serving, and it actually improves in flavor as the Mars Bar pieces soften and meld with the base. Store it covered in the refrigerator until ready to serve, making it an excellent make-ahead dessert for parties.
How should I store Mars Bar Slice?
Store Mars Bar Slice in an airtight container in the refrigerator for up to one week. For longer storage, wrap individual squares tightly and freeze for up to 2 months. Keep refrigerated to maintain the chocolate’s glossy finish and prevent the slice from becoming too soft at room temperature.
What equipment do I need to make Mars Bar Slice?
You only need basic kitchen equipment: a greased and lined baking tin, mixing bowl, and a saucepan or microwave for melting ingredients. Most home bakers already have these tools, making this recipe accessible without requiring specialized equipment. A serrated knife is helpful for clean cutting when serving.
Can I use different candy bars instead of Mars Bars?
Absolutely! You can substitute Mars Bars with Moro Bars, Snickers Bars, or Milky Way Bars for different flavor profiles. You can even mix different candy bars together for unique combinations. Each variation will create a distinct taste while maintaining the same delicious texture and preparation method.
Why is my Mars Bar Slice too soft or not setting properly?
If your slice isn’t setting, ensure you’re using enough chocolate for the topping and refrigerating for adequate time. The mixture may be too warm when pressed into the tin, or the refrigerator temperature might be inconsistent. Allow proper cooling time and maintain steady refrigeration temperature for best results.
How do I cut Mars Bar Slice cleanly?
For clean cuts, let the slice sit at room temperature for 30 minutes before cutting, then use a sharp serrated knife. Wipe the knife clean between cuts to prevent chocolate from dragging. Avoid cutting until you’re ready to serve, as this helps prevent the layers from separating.
