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The BEST Thermomix Malteser and Mars Bar Slice

This Thermomix Mars Bar and Maltesers Slice recipe is seriously the best!! It's filled with yummy Mars Bar and Maltesers pieces and then has a thick chocolate layer with more Maltesers on top - what more could you want?!
Prep Time20 mins
Chilling Time3 hrs
Total Time3 hrs 30 mins
Course: Slices
Keyword: Dessert, no bake, Thermomix
Servings: 24 pieces
Author: Lauren


  • 150 grams Maltesers - plus extra to decorate grab a 280g pack
  • 4 Mars Bars 4 x 53g bars - broken in half
  • 250 grams Chocolate Ripple Biscuits
  • 100 grams butter
  • 170 grams sweetened condensed milk
  • 400 grams Milk Chocolate
  • 1 tsp coconut oil optional


  • Line the base and sides of a 28 x 18cm slice tin with baking paper.
  • Place the Mars Bars into your Thermomix bowl and mix for 3 seconds on speed 5 to roughly chop.  You may need to mix for a little longer if they have been stored in the fridge. Transfer to a separate bowl until needed.
  • Without washing the bowl, add the chocolate ripple biscuits and mix for 7 seconds, speed 7 to crush. Add the Maltesers (150grams) and mix for 4 seconds, speed 4 to roughly crush. Transfer to the bowl with the Mars Bar pieces.
  • Without washing the bowl, add the butter and sweetened condensed milk and cook for 3 minutes, 70 degrees, speed 2. If the mixture hasn't quite melted, cook for a further 2 minutes, 60 degrees, speed 2.
  • Return the crushed biscuits, Mars Bars and Maltesers to the Thermomix bowl and mix for 10 seconds, speed 4 , REVERSE to combine. Scrape down the sides of the bowl and mix for a further 5 seconds, speed 4 REVERSE.
  • Pour the mixture into the slice tin (don't worry it will be sticky) and flatten with the back of a metal spoon.  
  • Break the milk chocolate into squares and place it along with the coconut oil (if using) into a microwave safe bowl and cook for 30 seconds spurts (stirring in between) until melted.
  • Pour the melted chocolate over the cooled slice and then decorate with remaining Maltesers.
  • Put the slice back into the fridge and allow it to chill for a minimum of three hours before cutting into pieces.


- You will have plenty of Maltesers (and some leftover!) if you buy a family pack.
- This slice will keep for up to one week when stored in an airtight container in the fridge.