Texas Sheet Cake

2 c. flour
2 c. sugar
1 t. baking soda
1/4 t. salt
1 c. butter
1/3 c. unsweetened cocoa powder
2 eggs
1/2 c. buttermilk
1 1/2 t. vanilla
1 c. water
1 recipe Chocolate-Buttermilk frosting

Mix flour, sugar, baking soda and salt. Set aside. In a saucepan combine butter, cocoa and water. Bring to a boil stirring constantly. Remove from heat and add mixture to flour mixture. Beat with and electric mixer until smooth. Add eggs, buttermilk and vanilla. Beat for 1 minute. Pour into a greased cookie sheet. Bake for 35 minutes at 350 degrees F. Pour frosting over cake while still warm.

Frosting:
1/4 c. butter
3 T. unsweetened cocoa powder
3 T. buttermilk
2 1/4 c. powdered sugar
1/2 t. vanilla

In a sauce pan combine butter, cocoa, and buttermilk. Bring to a boil, remove from heat. Add sugar and vanilla. Beat until smooth.