best mars bar slice recipe
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5 from 3 votes

Mars Bar Slice

A four-ingredient, no-bake slice recipe that everyone will love
Prep Time30 mins
Cook Time0 mins
Total Time30 mins
Course: Dessert
Cuisine: Australian
Keyword: mars bar slice
Servings: 20 slices
Calories: 87kcal


  • 4 53g Mars bars
  • 3 cups rice bubbles
  • 60 grams butter
  • 2 teaspoons golden syrup
  • 180 grams milk chocolate


  • Grease a slice tin (around 27 x 17cm) with butter and then line with baking paper.
  • Measure rice bubbles into a large mixing bowl.
  • Break mars bars into pieces with your hands and put into a saucepan. Add butter and golden syrup.
  • Place saucepan on medium heat while stirring to combine.
  • Keep stirring until the mixture reaches a smooth, runny consistency. Use a whisk to stir the mixture towards the end of the process to help get that completely smooth consistency. The mixture should resemble melted chocolate, with no lumps.
  • Add mixture to rice bubbles and stir quickly to combine.
  • Spread out mixture in the slice tin, spreading evenly to the edges and then pressing into the tin with the back of a metal spoon. Place in fridge for 1/2 hour.
  • Melt chocolate in the microwave using 15 second bursts. (check and stir after each burst).
  • Pour melted chocolate over the slice and angle tin from edge to edge to help chocolate reach each side and corner of the slice tin.
  • Place in fridge for 15-30 minutes. Ideally, the chocolate shouldn't be completely set when cutting (it will crack as you're cutting if it's too hard).
  • Cut slice into squares and return to the fridge.


Calories: 87kcal | Carbohydrates: 10g | Protein: 1g | Fat: 6g | Saturated Fat: 3g | Cholesterol: 6mg | Sodium: 45mg | Potassium: 31mg | Fiber: 1g | Sugar: 6g | Vitamin A: 355IU | Vitamin C: 2.6mg | Calcium: 3mg | Iron: 1.5mg