1 (4 oz.) pkg. sweet cooking chocolate
3 tbsp. butter
1 1/2 c. sifted powdered sugar
3 tbsp. hot water

In a small saucepan melt together the chocolate and butter. Remove from heat, stir in powdered sugar and water. Add more hot water if needed to make a pouring consistency. Pour over cake to glaze. Frosts top of 10-inch tube pan.