Put the biscuits in a plastic bag and crush with a rolling pin to create crumbs, leave a few larger pieces to create texture
In a pan, melt the chocolate callets, margarine, cocoa powder and golden syrup together and stir to create a glossy mixture.
Pour two-thirds of the chocolate into a bowl and stir in the biscuits, cherries and marshmallows
Spoon the mixture into a lined square tin and press down
Chill for a couple of hours to set and cut into equal sized slices.
TOP TIP: Use gluten free digestives for a gluten free treat