Created by Tisme on October 18, 2015
Step 1: Grease a 20cm x 30cm lamington pan.
Step 2: Process the biscuits until fine. Combine the biscuit crumbs and butter in a medium bowl. Press the mixture evenly into the prepared pan. Cover and refrigerate 30 minutes or until the mixture is firm.
Step 3: Sift the icing sugar into a medium bowl. Stir in the essence, oil and enough of the milk to make a firm, spreadable paste. Spread the paste evenly over the base, and stand until set.
Step 4: Spread combined melted chocolate and extra oil evenly over peppermint layer. Refrigerate until firm. Cut into slices with a large, hot knife.