2 cups white sugar
2 cups all-purpose flour
1/4 cup unsweetened cocoa powder
1 teaspoon baking soda
1 teaspoon baking powder
1 teaspoon salt
1/2 cup butter
1 cup water
1/2 cup buttermilk
2 eggs, beaten
1 teaspoon vanilla extract

DIRECTIONS:
1. Preheat oven to 375 degrees F (190 degrees C). Grease and flour a 9x13 inch pan. Mix together the sugar, flour, cocoa, baking powder, baking soda and salt. Set aside.
2. In a large saucepan bring butter and water to a boil. Remove from heat. Stir in flour mixture. Pour in buttermilk, eggs and vanilla; mix thoroughly.
3. Pour cake batter into prepared 9x13 inch baking pan. Bake in preheated oven for 25 minutes or until a toothpick inserted in center comes out clean. Remove cake from oven and frost immediately.

Pour-over frosting: melt 1 stick margarine with 6 tablespoons of milk and about 1/4 cup cocoa in a saucepan until it boils, then remove from heat. Beat in powdered sugar (about 4 cups) and 1 tablespoon of vanilla. Pour over warm cake.