Chocolate Zucchinni Cake

1/2 c. margarine
1/4 c. oil
1 3/4 c. sugar
2 c. zucchini (grated) ( I used about 1 cup)
1 tsp. vanilla
1/2 c. sour cream
2 eggs
2 1/2 c. flour
4 Tbsp. cocoa
1/2 tsp. cinnamon
1 tsp. salt
1 tsp. baking soda
1 tsp. baking powder

Mix and pour in 9x13 pan. Bake at 350 for 40-45 min. Topping: 3/4 c. brown sugar & 1/2 c. chocolate chips