Texas Sheet Cake

I got this from one of my FAVORITE recipe books. It's the best recipe I have tried yet!

Cake:

• 1/2 cup butter
• 1/4 cup shortening
• 1 cup water
• 4 tbsp cocoa
• 2 cups sugar
• 2 cups flour
• 2 eggs
• 1 1/2 cup buttermilk
• 1 tsp. baking soda
• 1 tsp. vanilla
• 1 tsp. cinnamon

In saucepan, combine butter shortening, water, and cocoa. Bring to a boil. In a bowl, combine sugar and flour. Pour sauce pan mixture over sugar and flour, mix well. Add remaining ingredients. Beat well. Pour onto greased cookie sheet.
BAKE at 400 for 20 min.

Frosting:
1/2 cup butter, melted
4 tbsp cocoa
1 bag powdered sugar
tsp. vanilla
4-6 tbsp. milk

Mix well and frost cake while still warm