mars bar slice

Mars bar slice

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Mars bar slice

Difficulty: Easy

Time: 15 minutes plus chilling

Serves: 15

Mars bar slice is a bake I remember from my childhood. I can’t remember making it, but I do remember eating it. There’s nothing healthy about it but if you want something really easy to make with your kids then this is a great option. Once you’ve melted the mars bars and butter you just need to stir everything together and leave it to set. What could be simpler?! 


50g butter
1 tbsp golden syrup
4 regular sized mars bars (approx 200g)
3 cups Rice Crispies/rice bubbles (about 60g)
250g milk chocolate


Grease and line a baking tin, approximately 19cm x 28cm.

Make the base of the mars bar slice

Measure the butter (50g) and golden syrup (1 tbsp) out and add to a small pan. Get your kids to chop the mars bars up and then add them to the butter.

Melt on a low heat, stirring occasionally until it comes together in a smooth chocolate mixture.


Meanwhile measure the Rice Crispies (3 cups) out into a large mixing bowl.

Mix everything together so the Crispies are all nicely coated with the melted mars bar.

Pour into the baking tin and press down with the back of a spoon. We found a metal spoon worked best for this as the mixture didn’t stick to it.


Leave for 30 minutes or longer to set.

Add the chocolate topping

Melt the chocolate in the microwave at short intervals, stirring to make sure it melts evenly. If you don’t have a microwave, put it in a metal bowl over a pan of simmering water to melt.

Pour the melted chocolate over the top of the Rice Crispies mixture and spread out with a spatula. Gently tap the baking tin on the counter to make sure the chocolate has spread evenly.

Leave to set again, before cutting into squares to serve.



    • Thanks. They tasted just as good as I remembered! I need to find some more 1980/90s retro food to bring resurrect!

    • My other half says they were the nicest thing I’ve ever baked! They’re not exactly fine dinning but obviously must taste good!

  1. Oh my, I used to love these as a kid – my friends scottish Granny always made them for us. Pinned!

    Thanks for taking me back to a happy place! And for linking to #coolmumclub

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