Chocolate Sheet Cake

Ingredients

• 2 cups all purpose flour
• 1 stick butter or margarine
• 4 Tbsp. cocoa
• 1/2 cup buttermilk
• 1 tsp. vanilla
• 1/2 cup oil
• 2 cups sugar
• 1 cup water
• 2 eggs
• 1 tsp. baking soda