Just four ingredients are mixed together in this tasty recipe, which is easy enough for the kids to make on their own. Use either milk or dark chocolate for the topping.
Melt the Mars bars and the butter in the microwave on short 30 second intervals. Stir well.
When the butter and Mars bars are melted, add in the rice crispies. Mix well and transfer to a large baking tray lined with baking parchment. Even out with a wet knife or spoon.
Melt the chocolate in the microwave and pour over the rice crispies mix.