Favorite Chocolate Sheet Cake

This is a favorite cake of my Dad's. I got this recipe from my Aunt Karen. The cinnamon in it really makes it good.

• Ready In: 48 mins
• Serves: 40

Ingredients

• For Cake

• 2  cups flour
• 2  cups sugar
• 1⁄2 cup butter
• 1⁄2 cup  vegetable oil
• 1  cup water
• 4  tablespoons cocoa powder
• 2  eggs
• 1  teaspoon vanilla
• 1  teaspoon cinnamon
• 1  teaspoon baking soda
• 1⁄2 cup buttermilk

• For Icing

• 1⁄2 cup butter
• 6  tablespoons milk
• 4  tablespoons cocoa powder
• 1  teaspoon vanilla
• 1⁄2 cup  chopped pecans
• 1 (1 lb) box powdered sugar

Directions

1. To Make Cake: Preheat oven to 375 degrees. You will need a jellyroll pan or a smaller cookie sheet with a rim around all four sides. You will not need to grease the pan.
2. Mix the flour and sugar for the cake in a large mixing bowl and set aside.
3. In a saucepan bring the butter, vegetable oil, water and 4 tbs cocoa powder to a boil.
4. Pour the boiling mixture over the flour and sugar and stir together.
5. Add the eggs, vanilla, cinnamon, baking soda and buttermilk and stir to mix well.
6. Pour in the baking sheet and bake at 375 degrees for 18-20 minutes.
7. While cake is baking prepare the icing: Bring butter, milk and cocoa powder to a boil stirring constantly and then remove from heat.
8. Add the vanilla, nuts and box of powdered sugar and stir well.
9. Spread icing over cake while the cake is still warm.