Zucchini Chocolate Cake

We are currently experiencing zucchini overload here! So, I will be bombarding you with zucchini recipes! First up, this yummy, extra-moist cake is a delicious way to sneak kids their vegetables! Of course, my kids love their vegetables so much they fight over them!
Zucchini Chocolate Cake
1/2 cup of margarine
1/2 cup of vegetable oil
1 1/2 cups granulated sugar
1 egg
1 tsp. vanilla
1/2 cup sour milk (can make this by adding vinegar to milk)
2 tsp. baking soda
2 1/2 cups flour
4 Tbsp. baking cocoa
2 cups shredded zucchini
12 oz. package semi-sweet chocolate chips
Cream first three ingredients. Add egg and vanilla. Mix. Add sour milk. Mix well. Add dry ingredients and stir. Mix zucchini in last. Pour into pan and sprinkle chocolate chips all over the top. Bake at 325 degrees for 40-50 minutes.