Chocolate Sheet Cake

Ingredients:

    * 2 cups all-purpose flour

    * 2 cups white sugar

    * 1 teaspoon baking soda

    * 1 teaspoon ground cinnamon

    * 1/2 teaspoon salt

    * 1/2 cup margarine

    * 1/2 cup shortening

    * 1/4 cup unsweetened cocoa powder

    * 1 cup water

    * 2 eggs, beaten

    * 1/2 cup buttermilk

    * 1/2 cup margarine

    * 6 tablespoons milk

    * 1/4 cup unsweetened cocoa powder

    * 1 teaspoon vanilla extract

    * 4 cups sifted confectioners' sugar

Method:

   1. Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 10x15 inch jellyroll pan. In a large bowl, sift together the flour, sugar, baking soda, cinnamon and salt. Set aside.

   2. In a saucepan combine 1/2 cup margarine, shortening, 1/4 cup cocoa and water. Bring to a boil and cook for 1 minute. Pour the liquid mixture over the flour, sugar mixture; stir well. Blend in eggs and buttermilk.

   3. Pour batter into prepared pan. Bake in the preheated oven for 30 minutes, or until a toothpick inserted into the center of the cake comes out clean. Let cake cool 10 minutes, then frost while still warm.

   4. To make the Frosting: In a saucepan combine 1/2 cup margarine, milk and 1/4 cup cocoa. Bring to a boil and cook for 1 minute. Remove from heat and stir in vanilla. Mix in confectioners' sugar. Pour over warm cake