Chocolate Sheet Cake

2 cups flour
2 cups sugar
2 tp baking soda
1 tsp cinnamon
1/2 tsp salt
2 sticks butter
3 Tbsp cocoa
1 cup water
2 eggs
1/2 cup buttermilk
1 tsp vanilla

Frosting:
1 stick butter
4 Tbsp cocoa
6 Tbsp buttermilk
1 tsp vanilla
3 1/2 cups powdered sugar

Combine flour, sugar, soda, cinnamon & salt. Set aside. Bring to a boil: butter, cocoa, water. Add dry ingredients above. Mix well. Beat in eggs, buttermilk, vanilla. Bake in a 9 x 13 cookie sheet with edges.

To make frosting: bring butter & cocoa to a boil. Add buttermilk, vanilla. Set off of stove & add powdered sugar. Place on cake while still warm.