Chocolate Sheet Cake - cooking recipe

Ingredients

2 c. all-purpose flour
2 c. sugar
1 tsp. baking soda
1/4 tsp. salt
1 c. butter or margarine
1/3 c. unsweetened cocoa powder
2 eggs
1/2 c. buttermilk or sour milk
1 1/2 tsp. vanilla
Chocolate-Buttermilk Frosting (recipe follows)

Preparation

Grease a 15 x 10 x 1-inch or a 13 x 9 x 2-inch baking pan; set aside.
Combine flour, sugar, baking soda and salt; set aside.