Step 1

Line a 20 cm x 30 cm baking tray with non-stick baking paper.

Step 2

Crush biscuits in a food processor or blender until they resemble fine breadcrumbs.

Step 3

Place condensed milk, butter and peppermint chocolate into a saucepan and stir over low heat until melted. Alternatively, melt same ingredients in a glass bowl in the microwave.

Step 4

Add biscuit crumbs to the melted chocolate mixture, and mix until well combined.

Step 5

Press mixture into prepared pan.

Step 6

Melt cooking chocolate or choc bits and butter together in microwave. Stir until combined and pour over biscuit base.

Step 7

Chill in refrigerator until set.