Momma's Chocolate Sheet Cake

Chocolate Sheet Cake

½ cup butter or margarine, softened
½ cup shortening, softened
1 cup water
1/3 cup cocoa
2 cups flour
2 cups sugar
½ cup buttermilk (or if you don’t have buttermilk, put 1 tablespoon vinegar in bottom of ½ cup measuring cup and fill the rest with regular milk and let sit for a
1 teaspoon baking soda
1 teaspoon vanilla
2 eggs, beaten
Dash salt

Mix together butter, shortening, cocoa, and water; bring to boil. Pour over flour and sugar, which have been sifted together. Mix well. Add buttermilk, soda, vanilla, eggs, and salt and mix well. Bake 20 minutes at 350-375 degrees F. in greased and floured jelly rolls pan (10 x 15 inch). Five minutes before cake is done, prepare frosting.

FROSTING

½ cup butter or margarine
1/3 cocoa
1 teaspoon vanilla
6 tablespoons milk
4 cups powdered sugar
Melt butter; add cocoa, vanilla, and milk, and bring to a boil. Remove from heat and add powdered sugar and nuts. Mix well. Frost cake while hot.