Mars Bar Squares
What do you get when you melt together chocolate bars and mix them with Rice Krispies? These delicious, no-bake Mars Bar Squares, also known as Mars Bar Slice, are a perfect treat for any occasion. Their gooey and crunchy texture, topped with smooth milk chocolate, makes them absolutely addictive. Whether you’re hosting a party or simply indulging in a sweet craving, Mars Bar Squares are sure to impress everyone.

Why You’ll Love This Recipe
- Quick and Easy: With just a few simple steps, you can whip up these delightful squares in no time.
- No Baking Required: Forget about turning on the oven; this recipe is completely no-bake!
- Crowd-Pleaser: The combination of chocolate and Rice Krispies is a hit with both kids and adults alike.
- Customizable: Feel free to add nuts or dried fruits for an extra twist or swap out the chocolate for your favorite variety.
- Perfect for Any Occasion: Whether it’s a birthday party, bake sale, or just a cozy night in, these treats fit right in.
Tools and Preparation
Before diving into making your Mars Bar Squares, gather your essential tools. Having everything ready will streamline the process and ensure your dessert turns out perfectly.
Essential Tools and Equipment
- 8×8 inch (20×20 cm) square baking pan
- Large saucepan
- Mixing spoon
- Heatproof bowl
- Microwave
Importance of Each Tool
- 8×8 inch baking pan: This size is ideal for creating perfectly portioned squares that are easy to cut.
- Large saucepan: Allows for melting ingredients smoothly without burning them.
- Mixing spoon: A sturdy spoon helps combine all ingredients thoroughly for even distribution.
Ingredients
Ingredients:
– 1/2 cup unsalted butter
– 4 53 gram Mars bars (chopped)
– 3 cups Rice Krispies (aka Rice Bubbles)
– 1 cup milk chocolate chips (or chopped milk chocolate)
How to Make Mars Bar Squares
Step 1: Prepare Your Pan
Lightly grease an 8×8 inch (20×20 cm) square baking pan to prevent sticking.
Step 2: Melt the Butter
Add the unsalted butter to a large saucepan. Gently melt the butter over low heat until it becomes liquid.
Step 3: Add Mars Bars
Add the chopped Mars bars to the melted butter. Stir gently as they begin to melt together.
Step 4: Stir Until Smooth
Continuously stir the mixture until smooth. If you notice separation between the butter and chocolate bars, remove from heat and whisk until combined.
Step 5: Mix in Rice Krispies
Once melted, turn off the burner. Stir in the Rice Krispies/Rice Bubbles, ensuring they are evenly coated with the mixture.
Step 6: Transfer to Pan
Spoon the batter into the prepared pan. Gently press it down using a greased spatula or hands sprayed with non-stick cooking spray.
Step 7: Melt Chocolate Topping
In a heatproof bowl, add your milk chocolate chips or chopped chocolate. Microwave on medium power for 45-second intervals, stirring between each until almost melted. Stir until smooth.
Step 8: Finish and Set
Spread the melted chocolate over the bars in the pan. Let sit at room temperature for about 2 hours or until hardened before slicing into squares.
Enjoy your homemade Mars Bar Squares as a delightful treat!
How to Serve Mars Bar Squares
Mars Bar Squares are versatile treats that can be enjoyed in various ways. Whether you’re hosting a party, enjoying a movie night, or simply treating yourself, these squares can elevate any occasion.
For a Sweet Snack
- Pair with fresh fruit like strawberries or bananas for a delightful contrast.
- Serve alongside vanilla ice cream for an indulgent dessert experience.
At a Party
- Cut into smaller squares for easy serving on platters.
- Add colorful sprinkles on top before serving to make them more festive.
As a Lunchbox Treat
- Wrap individual squares in parchment paper for a fun lunch surprise.
- Combine with other snacks like nuts and dried fruits for a balanced treat.
With Coffee or Tea
- Enjoy with your favorite hot beverage; the sweet treat complements the bitterness of coffee perfectly.
- Offer as part of an afternoon tea spread for guests to enjoy.

How to Perfect Mars Bar Squares
To achieve the best Mars Bar Squares, it’s essential to follow specific techniques that enhance their flavor and texture. Here are some tips to ensure your squares turn out perfect every time.
- Use room temperature ingredients: This helps achieve a smoother melt when combining the butter and Mars bars.
- Don’t rush the melting process: Melting over low heat ensures the mixture remains smooth and avoids burning.
- Press firmly but gently: When transferring the mixture to the pan, press down firmly to create an even layer without squishing it too much.
- Let cool completely: Allowing the chocolate topping to set at room temperature prevents it from being too soft and maintains its shape when cut.
- Store properly: Keep leftovers in an airtight container at room temperature for optimal freshness.
Best Side Dishes for Mars Bar Squares
Mars Bar Squares pair wonderfully with several side dishes that complement their rich flavors. Here are some great options to consider:
- Fresh Fruit Salad: A mix of seasonal fruits adds freshness and balances the sweetness of the squares.
- Vanilla Ice Cream: The creamy texture of ice cream contrasts beautifully with the chewy Mars Bar Squares.
- Whipped Cream: A dollop of whipped cream enhances the dessert experience when served alongside these bars.
- Chocolate Dipped Strawberries: These sweet bites create a luxurious pairing with Mars Bar Squares, perfect for special occasions.
- Coffee or Espresso: The rich flavors of coffee provide an excellent counterpoint to the sweetness of the treats.
- Cheese Platter: A selection of mild cheeses can balance the sweetness and offer a savory contrast to your dessert spread.
Common Mistakes to Avoid
Making Mars Bar Squares can be simple, but there are a few common mistakes that can lead to less-than-perfect results. Here’s how to avoid them.
- Using the wrong chocolate: Always use high-quality milk chocolate for the topping. Lower quality chocolate may not melt well and can affect the texture.
- Not greasing the pan: Failing to grease the baking pan properly can lead to sticking. Use butter or cooking spray to ensure easy removal.
- Overheating the mixture: Melting ingredients over too high heat can cause separation. Always melt chocolate and butter on low heat for a smooth blend.
- Skipping chilling time: Rushing the cooling process will result in gooey squares. Allow at least 2 hours for proper setting before slicing.
- Not measuring Rice Krispies accurately: Too many or too few Rice Krispies can change the texture. Use precise measurements for best results.

Storage & Reheating Instructions
Refrigerator Storage
- Store Mars Bar Squares in an airtight container.
- They will last up to 1 week in the refrigerator.
Freezing Mars Bar Squares
- Wrap individual squares tightly in plastic wrap.
- Place wrapped squares in a freezer-safe container, where they can be stored for up to 3 months.
Reheating Mars Bar Squares
- Oven: Preheat to 300°F (150°C). Bake for about 5 minutes until warm but not melted.
- Microwave: Heat on low power in short bursts of 10-15 seconds until warm.
- Stovetop: Place in a non-stick pan over low heat, stirring gently until warmed through.
Frequently Asked Questions
Here are some common queries about making Mars Bar Squares.
Can I use other chocolate bars?
Yes, you can substitute Mars bars with other chocolate bars like Snickers or Twix for different flavors.
How do I make gluten-free Mars Bar Squares?
Simply ensure that the Rice Krispies used are labeled gluten-free, and all other ingredients are also gluten-free.
Can I add nuts to my Mars Bar Squares?
Absolutely! Chopped nuts like almonds or walnuts can enhance texture and flavor.
How do I know when my Mars Bar Squares are set?
They should feel firm to touch and hold their shape when cut. Allow them enough time at room temperature to set properly.
Final Thoughts
Mars Bar Squares are not only delicious but also incredibly versatile. You can customize them with different toppings or add-ins like nuts or dried fruit. Their no-bake nature makes them perfect for any occasion, from casual gatherings to special events. Give this recipe a try, and experience a delightful treat that everyone will love!

Mars Bar Squares
- Total Time: 25 minutes
- Yield: Approximately 16 servings 1x
Description
Indulge in the delightful world of Mars Bar Squares, a no-bake treat that promises to satisfy your sweet cravings. Combining rich, melted Mars bars with crunchy Rice Krispies, these squares are topped with smooth milk chocolate for an irresistible finish. Perfect for parties or as a cozy snack at home, they are easy to make and even easier to enjoy.
Ingredients
- 1/2 cup unsalted butter
- 4 Mars bars (chopped)
- 3 cups Rice Krispies
- 1 cup milk chocolate chips
Instructions
- Lightly grease an 8×8 inch baking pan.
- Melt the butter in a large saucepan over low heat.
- Stir in the chopped Mars bars until fully melted and combined.
- Remove from heat and mix in the Rice Krispies until evenly coated.
- Transfer the mixture to the prepared pan, pressing down gently.
- Melt the milk chocolate chips in a heatproof bowl, then spread over the squares.
- Let set at room temperature for about 2 hours before slicing into squares.
- Prep Time: 15 minutes
- Cook Time: 10 minutes
- Category: Dessert
- Method: No Bake
- Cuisine: Australian
Nutrition
- Serving Size: 1 square (40g)
- Calories: 190
- Sugar: 14g
- Sodium: 50mg
- Fat: 10g
- Saturated Fat: 5g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 24g
- Fiber: 0g
- Protein: 2g
- Cholesterol: 15mg