- STEP 1
Line a shallow 7x11inch tin with baking paper (foil works too but can be harder to peel off at the end).
- STEP 2
Put the syrup, margarine and drinking chocolate into a pan and heat until the margarine has melted. Remove from the heat and allow to cool slightly.
- STEP 3
Stir in the marshmallows and crushed biscuits, then mix thoroughly. Pour the mixture into the tin and spread pressing down with a spoon, then chill until firm.
- STEP 4
Melt the chocolate in a bowl over a pan of water, or in the microwave. Spread this evenly over the base and again chill before peeling off the paper and cutting into pieces.