This crispy Thermomix Mars Bar slice is made with just five ingredients and takes only ten minutes to prepare. With no baking required, it's a chocolatey, crunchy treat that's always a hit.
I love a no-bake treat - no need to watch the oven and less risk of things going wrong. It's perfect for children's birthday parties and special occasions.
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Why You'll Love This Recipe
- Just 5 simple ingredients and 10 mins of prep time.
- Keeps well in the fridge or freezer.
Recipe Ingredients
Note: The full quantities are shown in the recipe card below.
- Mars Bars - use the 47g Mars Bars if you can find them. If not, any size Mars Bars will do as long as the total weight is 190g.
- Rice Bubbles - called Rice Krispies, in the UK. You could also use Coco Pops.
- Butter - use unsalted.
- Milk chocolate - use baking chocolate melts. Excellent quality brands are Cadbury or Nestlé. I don't recommend home-brand baking chocolate for this recipe, as the taste is not good.
- Vegetable oil - add a little to the melted chocolate to prevent the topping from cracking.
Step-by-Step Directions
Note: This is a summary of the instructions. The full ingredients and instructions are shown in the recipe card below.
- Line a 20 cm square tin with baking paper.
- Slice the Mars Bars into 2 cm pieces and add them to the Thermomix bowl, then add the butter.
- Melt for 5 minutes until the Mars Bars melt. Scrape down the bowl and stir the mixture with a spatula. If the Mars Bars don't melt completely, that's okay.
- Add the Rice Bubbles to the mixture.
- Mix for 20 sec/reverse/speed 3 until combined. Stir well with a spatula to ensure everything is evenly coated.
- Tip the mixture into the prepared tin and press down firmly and evenly with the back of a spoon, making sure to reach the corners. Place in the fridge to set while you make the chocolate topping.
- To make the chocolate topping, grate and melt the chocolate in a clean Thermomix bowl.
- Pour the chocolate over the crackles, level with a spoon, and transfer to the fridge to set for 2-3 hours or overnight.
Serving Suggestions
Remove from the fridge 30 minutes before serving. Slice into squares using a warm knife.
Storage
Store in an airtight container in the fridge for up to one week. The slice can also be frozen for up to one month.
📖 Recipe
Thermomix Mars Bar Slice
A crispy, crunchy treat that's perfect for birthday parties, lunchboxes, or any sweet craving.
Ingredients
- 4 x 47g Mars Bars, see notes
- 80 g unsalted butter, chopped, plus extra for greasing
- 110 g Rice Bubbles, or Rice Krispies, or Rice Pops
Chocolate Topping
- 275 g milk melting chocolate, note 1
- 1 tablespoon vegetable oil
Instructions
- Line a 20cm square tin with baking paper, leaving an overhang on two sides.
- Chop the Mars Bars into 2cm pieces and add to the Thermomix bowl with the butter. Melt for 5 min/60°C/speed 2.5 (it's fine if not completely smooth). Scrape down the bowl and stir well to combine.
- Add the Rice Bubbles and mix for 20 sec/reverse/speed 3 until combined. Scrape down the bowl and stir well.
- Transfer the mixture to the prepared tin and press down firmly with the back of a spoon until smooth and level, making sure to reach the corners. Place in the fridge while you make the topping.
- For the chocolate topping, clean and dry the Thermomix bowl. Add the chocolate and grate for 8 sec/speed 10. Scrape down, add the oil, then melt for 3 min/50°C/speed 2. If needed, heat for a further 1-2 minutes.
- Pour the melted chocolate over the slice and smooth the top with a spoon or palette knife. Refrigerate for 2-3 hours or until set.
- To serve, remove from the fridge 30 minutes before cutting. Slice into squares using a warm knife.
Notes
Mars Bars - use any size bars, as long as the total weight is around 190 g.
Milk chocolate - use baking chocolate melts (such as Cadbury or Nestlé) for best results.
Nutrition
Serving: 1g | Calories: 244kcal | Carbohydrates: 34g | Protein: 3g | Fat: 11g | Saturated Fat: 5g | Polyunsaturated Fat: 3g | Cholesterol: 16mg | Sodium: 129mg | Fiber: 1g | Sugar: 17g
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