Base
1/2 cup brown sugar
1/2 cup corn syrup
1 cup peanut butter
1 cup Rice Krispies cereal
1 cup corn flakes

Combine sugar and corn syrup in sauce pan, heat until sugar dissolves. Add peanut butter, Rice Krispies, and corn flakes, mix well and press into 8-inch square pan.

Filling
1/4 cup soft butter
3 tablespoons vanilla custard powder
3 tablespoons milk
2 cups confectioners' sugar
Few drops green food coloring
    (optional for Christmas color)

Beat butter, vanilla custard, milk and confectioners' sugar. Spread over peanut butter base. Refrigerate.

Topping
3 (1 ounce) squares semi-sweet chocolate
3 tablespoons butter

Melt chocolate and butter together over hot water, cool slightly and spread over custard. Refrigerate 2 hours before cutting but take out of the fridge 10 minutes before slicing. Serve cool.