Chocolate Zucchini Cake

Cream:
1/2 cup soft margarine
1/2 cup vegetable oil
1 3/4 cup sugar

Add:
2 eggs
1 tsp vanilla
1/2 cup sour milk (to sour milk, you add 1 tsp of white vinegar to every 8 ounces)

Add dry ingredients:
2 1/2 cup flour
4 Tablespoons cocoa
1/2 tsp baking powder
1 tsp baking soda
1/2 tsp cinnamon

Add:
2 cups grated zucchini

Bake in 9x12 greased and floured pan at 325 degrees for 40 to 50 minutes. Frost or sprinkle (unbaked) with 1/2 cup chocolate chips and nuts if desired.