Crispy Mars Bar fridge cake

The Birthday Cake Book
Laura Edwards

These friendly robots will delight any young child, both to help create and as a birthday party centrepiece. Make several batches and assemble an army!

For the robots


Quantity Ingredient
100g unsalted butter, diced, plus more for the tin
200g crispy puffed rice cereal
4 mars bars, roughly chopped
350g 55% cocoa solids chocolate, chopped
1 tablespoon golden syrup

To decorate

Quantity Ingredient
100g white chocolate, melted
100g 55% cocoa solids chocolate, melted
an assortment silver and coloured chocolate beans
an assortment silver dragees, in several sizes


  1. Butter a 23 cm square loose-bottomed cake tin, and line the base with baking parchment. Tip the rice cereal into a large mixing bowl.
  2. Melt the Mars Bars, chocolate, butter and syrup in a bowl over gently simmering water, making sure the bowl does not touch the water and stirring from time to time. Once the mixture has melted, tip it into the rice cereal and stir well until combined. Pour into the prepared tin, and press down with the back of a spoon or a palette knife to make it compact. Place in the fridge to set for at least a couple of hours, or preferably overnight.
  3. When ready to make the robots, tip out the square on to a chopping board. You must cut out the heads and bodies first, then the legs and arms. The feet and necks can then be cut out from what’s left. Once you have cut out your robots, assemble the bodies with cocktail sticks.
  4. Place the two different types of melted chocolate into two piping bags and decorate the robots as you wish, sticking on sweets and dragees as you do so.

To construct

  • For one robot you will need 1 head (7 x 7 cm), 1 neck (2.5 x 1.5 cm), 1 body (8.5 x 8.5 cm), 2 arms (8.5 x 2.5 cm), 2 legs (5 x 2.5 cm) and 2 feet (3.5 x 2.5 cm).
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