Buttermilk Brownies

2 cups granulated sugar
2 cups flour
4 tablespoons cocoa
1 cup cold water
1/2 cup margarine
1/2 cup vegetable oil
1/2 cup buttermilk
1 teaspoon baking soda
2 eggs

Sift sugar, flour and cocoa together.

In saucepan, bring water, margarine and oil to boil. Pour over dry ingredients in large bowl and beat until creamy. Add buttermilk, baking soda and beaten eggs. Beat thoroughly. Bake at 400 degrees F for 18 minutes. Frost while warm.

Frosting
1/3 cup margarine
1/4 cup cocoa
1/3 cup buttermilk
1/2 teaspoon vanilla extract
Confectioners