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Easy Thermomix Mars Bar Brownies Recipe

Thermomix Mars Bar Brownies

Our easy Thermomix Mars Bar Brownies recipe makes a great dessert, party food or special treat!
5 from 2 votes
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Keyword: Brownies, Chocolate, Christmas
Prep Time: 10 minutes
Cook Time: 35 minutes
cooling time: 2 hours
Total Time: 45 minutes


  • 150 grams butter
  • 220 grams caster sugar
  • 75 grams cocoa
  • 1 tsp vanilla extract
  • 3 eggs
  • 75 grams plain flour
  • 5 x 53gram Mars Bars


  • Preheat your oven to 160 degrees and line the base and sides of a 20cm square baking tin with baking paper – this will help you to remove the Mars Bar Brownies once they are cooked.
  • Roughly chop the Mars Bars and set aside until needed.
  • Place the butter (which has been cut into 4 pieces, cocoa and caster sugar into your Thermomix bowl and cook for 3 minutes, 60 degrees, speed 2 to melt. If it's not quite melted, cook for a further 1 minute, 60 degrees, speed 2.
  • Add the vanilla extract, eggs and plain flour and mix for 10 seconds, speed 4 to combine.
  • Scrape down the sides of your Thermomix bowl and add the Mars Bar pieces you set aside earlier and mix for 6 seconds, speed 4 on REVERSE to combine.
  • Pour the brownie mixture into the prepared tin and use a spatula to gently spread it across the tin. Place the brownies into the oven to bake for 35 minutes.
  • Carefully remove the cooked brownies from the oven and allow them to cool in the tin before removing, cut into small pieces .


It’s important to let these Mars Bar Brownies cool completely in the tin as it will help their gooey centre to set.