Mars bar cakes

(41 ratings)

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Mars bar cake
Mars bar cake
  • Serves: 6

  • Prep time:

  • Cooking time:

    For cooling
  • Total time:

  • Skill level: Easy peasy

  • Costs: Cheap as chips

Quick, tasty and best of all you don't need to cook them, these Mars bar cakes are the perfect naughty treat to make with the kids. You can get the little ones to help you with mixing the melted chocolate with the Rice Krispies and then patting the mixture into a lined tin. You need to leave the mixture to set for 30 minutes, so make sure you've got something to distract the kids with because they'll definitely want to eat it right away!


  • 5 standard-size Mars bars
  • 200g white chocolate
  • 150g butter
  • Rice Krispies to absorb the mixture – approx 100g
  • 2 tbsp golden syrup

When melting the whilte chocolate don't be tempted to stir it, just let it melt by itself


  1. Grease a rectangular tin – approx 15 x 30cm – and line with baking parchment.
  2. Melt the butter and Mars bars in a small pan. When it’s all melted, add the Rice Krispies and stir until they are all coated with the chocolate mixture.
  3. Press the mixture into the lined tin and leave to set.
  4. Melt the white chocolate in a bowl over a pan of simmering water, then pour it over the top of the cake.
  5. Cut into squares when cold and store in an airtight container.

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Average rating

  • 3
(41 ratings)

Your comments


I made this today as a thank you gift. Although it is yummy, it is sickly sweet and leaves your mouth a bit claggy and sticky. I added the golden syrup in with the mars bars and butter but I think next time I'll leave it out and see if that helps. I cut mine into star shapes and decorated with drizzled white chocolate and white chocolate stars. It's super dooper quick and easy if you're in a rush! :)

Louise Tompkins

would love to make this but i need to know how many carbs are in each square as my son is diabetic. thanks in advance.x


I love this cake so easy to do, brill if you have a sweet tooth

Jo Lovegrove

I know it leaves it out in the actual Method but I'd put the golden syrup whilst melting the mars bar and butter....that's what I do when I make Rice Crispie cakes with my children.

Charity Clark

What are you supposed to do with the Golden Syrup? Confused.

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