If you love chocolate, caramel, and crunchy treats, this Mars Bar Crispy Cake Recipe is one you need to try. Made with melted Mars bars, butter, crispy rice cereal, and a delicious milk chocolate topping, these no-bake treats are incredibly easy to prepare. They have a chewy, gooey centre with plenty of crunch in every bite.
The best part is that you don’t need an oven or any complicated baking equipment. Simply melt the ingredients together, stir through the Rice Krispies, press everything into a baking tin, and finish with a smooth layer of chocolate. After a little time in the refrigerator, you’ll have delicious crispy cakes ready to slice and enjoy.
Whether you’re making treats for children, preparing something sweet for a party, or looking for an easy weekend dessert, this Mars Bar Crispy Cake Recipe is a wonderful choice. It uses everyday ingredients and takes only a few minutes of preparation.
Recipe Overview
- Category: Dessert / No-Bake Treat
- Cuisine: British
- Servings: 16 squares
- Prep Time: 15 minutes
- Chilling Time: 2 hours
- Total Time: 2 hours 15 minutes
- Calories: Approximately 260 kcal per square
What Is a Mars Bar Crispy Cake?
A Mars Bar crispy cake is a popular no-bake chocolate treat made by combining melted Mars bars and butter with crispy rice cereal. The mixture is pressed into a baking tin and covered with melted milk chocolate before being chilled until firm.
Unlike traditional crispy cakes made with marshmallows, this version uses Mars bars to create a rich, chewy texture. The chocolate nougat and caramel inside the bars melt into the butter, forming a sticky mixture that holds the cereal together.
The finished squares have several delicious textures: crunchy cereal, soft caramel, chewy nougat, and a smooth chocolate topping. They are especially popular in the UK and are often made for birthday parties, school events, bake sales, and family gatherings.
Why You’ll Love This Mars Bar Crispy Cake Recipe
- No baking required: You don’t need an oven to make these delicious chocolate treats.
- Simple ingredients: Mars bars, butter, crispy rice cereal, and chocolate are all you need.
- Quick preparation: The mixture takes around 15 minutes to prepare before chilling.
- Perfect for sharing: Cut the mixture into squares for parties, lunchboxes, or afternoon snacks.
- Amazing texture: Every bite combines crunchy cereal with gooey caramel and smooth chocolate.
- Easy to customise: Add white chocolate, sprinkles, or chopped nuts to create your own version.
Ingredients for Mars Bar Crispy Cake
You only need a handful of ingredients to make this homemade Mars Bar crispy cake. For the best results, measure everything before you begin.
For the Crispy Cake Base
- 4 standard Mars bars (approximately 200 g), chopped into small pieces
- 100 g unsalted butter
- 150 g Rice Krispies or crispy rice cereal
For the Chocolate Topping
- 200 g milk chocolate, chopped
- 1 tablespoon unsalted butter or vegetable oil, optional
Optional Decorations
- 30 g white chocolate, melted
- Chocolate sprinkles
- Mini chocolate chips
- A pinch of sea salt
Equipment Needed
- 20 cm square baking tin
- Baking parchment
- Large heatproof mixing bowl
- Heatproof saucepan
- Wooden spoon or silicone spatula
- Sharp knife
- Microwave-safe bowl, if using a microwave
- Measuring scales
Recipe Video Guide
How to Make Mars Bar Crispy Cake
Follow these six simple steps to make delicious homemade crispy cakes. The key is to melt the Mars bars gently and mix the cereal thoroughly so every piece gets coated in the caramel-chocolate mixture.
Step 1: Prepare the Baking Tin
Line a 20 cm square baking tin with baking parchment, leaving a little extra paper hanging over the sides. This makes it easier to lift the finished crispy cake out of the tin once it has chilled. Lightly grease the parchment with a little butter if needed. Set the prepared tin aside while you make the chocolate mixture.
Step 2: Chop and Melt the Mars Bars
Cut the Mars bars into small pieces so they melt more evenly. Place them in a heatproof bowl with the unsalted butter. Set the bowl over a saucepan containing a little gently simmering water, making sure the bottom of the bowl does not touch the water. Stir slowly until the chocolate, caramel, and butter melt into a thick, sticky mixture. Avoid overheating it.
Step 3: Add the Rice Krispies
Remove the melted mixture from the heat and let it cool for approximately one minute. Add the Rice Krispies gradually, stirring gently with a wooden spoon or silicone spatula. Continue mixing until the cereal is evenly coated in the melted Mars bar mixture. Work fairly quickly because the mixture will begin to thicken as it cools.
Step 4: Press the Mixture into the Tin
Transfer the crispy mixture into your prepared baking tin. Spread it evenly using a spatula, then gently press it down to create a compact, level base. Avoid pressing too firmly, as this can crush the cereal and make the finished squares too dense. Pay particular attention to the corners so the mixture is evenly distributed.
Step 5: Melt and Add the Chocolate Topping
Break the milk chocolate into small pieces and melt it gently in a heatproof bowl over simmering water or in the microwave using short intervals. Stir until completely smooth, then mix in the optional butter or vegetable oil for a softer finish. Pour the melted chocolate over the crispy base and spread it evenly with a spatula. Add white chocolate or sprinkles if desired.
Step 6: Chill, Slice, and Serve
Place the tin in the refrigerator for approximately 2 hours, or until the chocolate topping is completely set and the base feels firm. Lift the crispy cake out using the parchment paper and place it on a chopping board. Leave it at room temperature for a few minutes before slicing into 16 squares with a sharp knife. Serve and enjoy!
Tips for the Best Mars Bar Crispy Cake Recipe
A few simple tricks can make a big difference to the texture and appearance of your homemade crispy cakes.
- Melt the chocolate gently: High heat can cause chocolate to burn or become grainy. Use low heat or short microwave intervals.
- Cut the Mars bars into small pieces: Smaller pieces melt more evenly and help prevent lumps in the mixture.
- Use fresh crispy rice cereal: Stale cereal can make your crispy cakes lose their signature crunch.
- Don’t crush the cereal: Stir gently and avoid pressing the mixture too firmly into the tin.
- Spread the topping evenly: A smooth chocolate layer makes the squares look neat and attractive.
- Allow enough chilling time: The base and topping need time to set properly before slicing.
- Warm your knife slightly: Run a sharp knife under warm water, dry it, and use it to cut cleaner squares.
Variations to Try
Mars Bar Crispy Cake with White Chocolate
For a sweeter finish, drizzle melted white chocolate over the milk chocolate topping. You can create decorative lines using a spoon or piping bag. Allow the white chocolate to set before cutting the squares.
Mars Bar Crispy Cake with Dark Chocolate
If you prefer a less sweet dessert, replace the milk chocolate topping with dark chocolate. Its slightly bitter flavour balances the sweetness of the caramel and nougat inside the Mars bars.
Mars Bar Crispy Cake with Mini Marshmallows
Add a small handful of mini marshmallows to the crispy rice cereal before mixing everything together. The marshmallows add extra chewiness and make the texture even more interesting.
Mars Bar Crispy Cake with Nuts
For extra crunch, stir chopped roasted hazelnuts, almonds, or peanuts into the cereal mixture. Nuts pair particularly well with chocolate and caramel. Check for allergies before serving.
Individual Mars Bar Crispy Cakes
Instead of using one large square tin, spoon the mixture into paper cupcake cases or silicone muffin moulds. Press each portion gently into place, add a little melted chocolate on top, and refrigerate until set. This is a convenient option for parties and packed treats.
What to Serve with Mars Bar Crispy Cake
These chocolate squares are delicious on their own, but you can serve them with other treats and drinks for a more complete dessert spread.
- A cup of tea: A classic British combination that balances the sweetness of the chocolate.
- Hot chocolate: Perfect for a cosy afternoon snack.
- Vanilla ice cream: Serve a crispy cake square alongside a scoop of ice cream for an easy dessert.
- Fresh strawberries: Their fruity flavour adds freshness to the rich chocolate and caramel.
- Whipped cream: A little lightly whipped cream makes the squares feel more indulgent.
- Coffee: A cup of black coffee or cappuccino pairs nicely with the sweet caramel flavour.
How to Store Mars Bar Crispy Cake
Once the chocolate topping has completely set, cut the crispy cake into squares and place them in an airtight container. Store them in the refrigerator for up to 1 week. If you are stacking the squares, place a sheet of baking parchment between the layers to prevent them from sticking together.
You can also store the crispy cakes in a cool, dry place for a shorter period, provided the room is not too warm. However, refrigeration helps the chocolate topping stay firm, especially during warmer weather.
For longer storage, freeze the squares in a freezer-safe airtight container for up to 2 months. Separate the layers with baking parchment to make them easier to remove individually. Defrost them in the refrigerator or at room temperature before serving.
Common Mistakes to Avoid
- Overheating the Mars bars: Excessive heat can make the mixture difficult to work with. Melt everything slowly.
- Adding too much cereal: Too much Rice Krispies can make the mixture dry and crumbly instead of chewy.
- Mixing too slowly: The melted Mars bar mixture thickens as it cools, so coat the cereal while it is still warm.
- Pressing the base too firmly: This can crush the cereal and make the crispy cakes hard.
- Pouring on hot chocolate: Let the topping cool slightly before spreading it over the base.
- Cutting before chilling: The mixture needs enough time to firm up, otherwise the squares may fall apart.
- Using a blunt knife: A sharp knife gives cleaner edges and helps prevent the chocolate topping from cracking.
Nutrition Information
The following nutrition values are estimates for one square, assuming the recipe makes 16 portions. Actual values may vary depending on the Mars bars, chocolate brand, and cereal used.
| Nutrient | Approximate Amount per Square |
|---|---|
| Calories | 260 kcal |
| Protein | 3 g |
| Carbohydrates | 31 g |
| Fat | 14 g |
| Saturated Fat | 8 g |
| Fibre | 1 g |
| Sugar | 23 g |
Final Thoughts
This Mars Bar Crispy Cake Recipe is proof that you don’t need complicated ingredients or baking skills to make something delicious. The combination of melted Mars bars, buttery caramel, crunchy Rice Krispies, and smooth milk chocolate creates a treat that is hard to resist.
It’s an excellent recipe for family gatherings, birthday parties, bake sales, or whenever you want an easy homemade chocolate dessert. Prepare a batch, let it chill, and cut it into squares for everyone to enjoy. Once you try this simple no-bake recipe, it may become one of your favourite sweet treats.
You may also like Mince and Dumplings Recipe.
Frequently Asked Questions
Do Mars Bar crispy cakes need to be refrigerated?
Yes, refrigeration is recommended because it helps the chocolate topping and caramel mixture firm up. Store the finished squares in an airtight container in the refrigerator to maintain their texture.
Can I make Mars Bar crispy cakes without Rice Krispies?
Yes. You can use another crispy rice cereal or a similar puffed cereal. However, the texture may vary slightly depending on the cereal you choose.
Why are my Mars Bar crispy cakes too hard?
They may become too hard if the mixture is pressed too firmly into the tin or if the chocolate topping is very thick. Press the base gently and allow the squares to sit at room temperature for a few minutes before serving.
How long do Mars Bar crispy cakes take to set?
They usually need around 2 hours in the refrigerator. The exact time depends on the thickness of the mixture and the temperature of your refrigerator.
Can I freeze Mars Bar crispy cakes?
Yes. Cut them into squares, place baking parchment between the layers, and store them in an airtight freezer-safe container for up to 2 months. Defrost before serving.
Can I make Mars Bar crispy cakes without butter?
Butter helps the Mars bars melt smoothly and creates a softer, more manageable mixture. You can experiment with a small amount of neutral vegetable oil, but the texture and flavour may be slightly different.
Can I use dark chocolate instead of milk chocolate?
Absolutely. Dark chocolate creates a less sweet topping that balances the caramel flavour of the Mars bars. Choose a chocolate you enjoy eating on its own.
Recipe Card
Mars Bar Crispy Cake Recipe
Ingredients
Equipment
Method
- Line a 20 cm square baking tin with baking parchment, leaving a little extra paper hanging over the sides. This makes it easier to lift the finished crispy cake out of the tin once it has chilled. Lightly grease the parchment with a little butter if needed. Set the prepared tin aside while you make the chocolate mixture.
- Cut the Mars bars into small pieces so they melt more evenly. Place them in a heatproof bowl with the unsalted butter. Set the bowl over a saucepan containing a little gently simmering water, making sure the bottom of the bowl does not touch the water. Stir slowly until the chocolate, caramel, and butter melt into a thick, sticky mixture. Avoid overheating it.
- Remove the melted mixture from the heat and let it cool for approximately one minute. Add the Rice Krispies gradually, stirring gently with a wooden spoon or silicone spatula. Continue mixing until the cereal is evenly coated in the melted Mars bar mixture. Work fairly quickly because the mixture will begin to thicken as it cools.
- Transfer the crispy mixture into your prepared baking tin. Spread it evenly using a spatula, then gently press it down to create a compact, level base. Avoid pressing too firmly, as this can crush the cereal and make the finished squares too dense. Pay particular attention to the corners so the mixture is evenly distributed.
- Break the milk chocolate into small pieces and melt it gently in a heatproof bowl over simmering water or in the microwave using short intervals. Stir until completely smooth, then mix in the optional butter or vegetable oil for a softer finish. Pour the melted chocolate over the crispy base and spread it evenly with a spatula. Add white chocolate or sprinkles if desired.
- Place the tin in the refrigerator for approximately 2 hours, or until the chocolate topping is completely set and the base feels firm. Lift the crispy cake out using the parchment paper and place it on a chopping board. Leave it at room temperature for a few minutes before slicing into 16 squares with a sharp knife. Serve and enjoy!
