Chocolate Cake I

Ingredients

 * 1 1/4 cup flour
 * 3/4 cup granulated sugar
 * 1/4 cup cocoa
 * 1/4 cup margarine, softened
 * 1 tsp baking powder
 * 1 tsp baking soda
 * 1/4 tsp salt
 * 2 large egg whites (1 lg egg works)
 * 1 tsp vanilla
 * 1 cup hot water
 * 2 tsp confectioner's sugar (option