Nanaimo Bars I

INGREDIENTS

• 1/2 cup butter
• 1/4 cup white sugar
• 5 tablespoons unsweetened cocoa powder
• 1 egg
• 1 teaspoon vanilla extract
• 2 cups graham cracker crumbs
• 1 cup shredded coconut
• 1/2 cup chopped walnuts
• 1/4 cup butter
• 2 cups confectioners' sugar
• 2 tablespoons vanilla custard powder
• 3 tablespoons milk
• 4 (1 ounce) squares semisweet chocolate, chopped
• 1 tablespoon butter