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Homemade Mars Bar Slice with a chocolate rice crispy base, topped with smooth milk chocolate and pieces of Mars Bar.

Mars Bar Slice

No-bake Mars Bar Slice tray bake with crisp rice, melted Mars Bars, and a glossy milk-chocolate top - quick to make and perfect for sharing.
5 from 12 votes
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Course: Dessert, Snack
Cuisine: Scottish
Prep Time: 10 minutes
Cook Time: 10 minutes
Total Time: 3 hours
Servings: 9

INGREDIENTS

  • 115 g Butter or Margarine
  • 230 g Mars Bars (Milky Ways in the USA) (roughly chopped)
  • 130 g Rice Krispies
  • 250 g Milk Chocolate

INSTRUCTIONS

  • Line a 20-20cm (8-inch) baking tin with some greaseproof paper and set aside.
  • In a large bowl, melt the butter/margarine and Mars Bars over a bain marie, or in short bursts in a microwave. Use the back of a spoon/spatula to break up the nougat of the Mars Bars, as this won't melt as well - don't worry about lumps though, it won't be perfectly smooth.
  • Add the rice crispies to the melted ingredients and mix well, ensuring all are coated.
  • Tip into your prepared baking tray and push down with the back of a spoon/spatula, ensuring an even finish right into the corners.
  • Melt the milk chocolate over a bain marie, or in short bursts in the microwave, before spreading it on top of your Rice Crispy base. Add a few pieces of chopped Mars Bar to decorate, if desired.
  • Place into the fridge to set for at least 2 hours or ideally overnight. Cut into your desired portion sizes to serve.

IMPORTANT NOTE:

All my recipes are developed using a digital scale and the metric system (grams and millilitres). Cup measurements are available as a conversion but these, unfortunately, won't always be as accurate. For best results, I always recommend baking with a digital scale.

RECIPE NOTES:

  • If using full sized Mars Bars (51g) you will need a little under five Mars Bars. If you are using multi-pack Mars Bars (usually about 40g each) you will need about 6 Mars Bars.
  • In America (and possibly other parts of the world), what we in the UK know as a Mars Bar is known as a Milky Way - which, confusingly, is something different again here in the UK. Either way, it's a nougat & caramel centered chocolate you are looking to use for this recipe.
  • Storage: Keep your Mars Bar Slice in an airtight container at room temperature for up to 7 days. If your kitchen is particularly warm, you can store it in the fridge.
  • Substitutions: Any crisped rice cereal will work here. You can also use supermarket own-brand chocolate bars instead of branded Mars Bars.
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