Lion House Chocolate Sheet Cake

I know, it's really Texas Sheet Cake, but we got the recipe from The Lion House Cookbook, so we have to call it what they call it :o)

This is a Rich Family staple--the Rich family Jeremy grew up in. It is such a staple, in fact, that when the oven went out on the houseboat at Lake Powell, we couldn't just NOT have it for dessert--we actually fired up the BBQ grill and cooked it that way. Not my preferred choice of baking, but it worked! Love you, Riches...

Lion House Chocolate Sheet Cake

Cake:
2 cups flour
2 cups sugar
1/2 cup butter or margarine, softened
1/2 cup shortening, softened
4 tablespoons cocoa
1 cup water
1/2 cup buttermilk**
1 teaspoon baking soda

1 teaspoon cinnamon
1 teaspoon vanilla
2 eggs, beaten
Dash salt

Frosting:
1/2 cup butter or margarine
4 tablespoons cocoa
1 teaspoon vanilla
6 tablespoons milk
4 cups powdered sugar
1 cup chopped nuts (optional)

Preheat oven to 400. Grease and flour a 10X15-inch jelly-roll pan (we just use a large cookie sheet with high sides). Set aside.

In a large bowl, sift together flour and sugar. Set aside. In a medium saucepan, mix together butter, shortening, cocoa, and water and bring to boil. Pour over flour and sugar mixture; mix well. Add buttermilk, soda, cinnamon, vanilla, eggs, and salt; mix well. Pour into jelly-roll pan and bake for 20 minutes.

Five minutes before cake is done, prepare frosting. In a medium saucepan 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.

**A tip on buttermilk: You don't have to buy it! Just add a tablespoon of lemon juice to 1 cup milk and let it sit for 5 minutes. Then use the desired amount in any recipe!