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3.97 from 26 votes

One Bowl Chocolate Mars Bar Cake

Prep Time15 mins
Cook Time40 mins
Total Time55 mins
Course: Cakes
Servings: 12
Author: Lauren


  • 250 g melted butter slightly cooled
  • ¾ cup caster sugar
  • 1 ½ cups of self raising flour
  • 3 eggs
  • ¾ cup of milk
  • ¾ cup sifted cocoa
  • 5 Mars Bars – chopped into small pieces
  • 1 extra mars bar to decorate
  • Chocolate icing


  • Preheat your oven to 180 degrees and grease and line the base and sides of a 20cm round cake tin with baking paper.
  • Put all of your ingredients into a large bowl and whisk until mixture is just smooth.
  • Add the chopped Mars Bars and carefully fold through.
  • Pour mixture into the cake tin and bake for approximately 40 minutes or until cake is cooked through when tested with a skewer.
  • Let the Chocolate Mars Bar Cake cool in the tin for 10 minutes before carefully transferring onto a wire rack to cool completely.
  • Once the cake has cooled, decorate with your favourite chocolate icing or ganache and decorate with the remaining Mars Bar.