Step 1

Preheat oven to 400 degrees F.

Step 2

Prepare a 9x13x2-inch pan or for sheet cake a 16x11x1-inch, pan with 'Baker's Joy' non-stick cooking spray (my suggestion) or grease and flour pans the old-fashioned way.

Step 3

Sift flour and sugar in a large mixing bowl and blend well. In a saucepan, combine butter, shortening, water, and cocoa. Bring to a rapid boil. Pour over flour/sugar mixture and mix well.

Step 4

Combine remaining ingredients and add ALL AT ONCE to the batter, mixing well.

Step 5

Pour into the prepared pan.

Step 6

Bake at 400 degrees F for 35 to 40 minutes (9x13x2-inch pan). For a sheet cake (16x11x1-inch), bake for 20 minutes or until tests done. Let cool 15-20 minutes while preparing the frosting.

Step 7

FROSTING: Combine butter, cocoa, and milk in a saucepan. Heat slowly and bring to boil.

Step 8

Add remaining ingredients; beat well.

Step 9

Spread over warm cake.

Step 10

Leave in pan until ready to serve. Cut in squares and enjoy!