Chocolate Zucchini Cake

1/2 c. butter
1/2 c. oil
1 3/4 c. sugar
2 eggs
1 tsp. vanilla
1/2 c. sour milk
2 1/2 c. flour
1/2 tsp. baking soda
1/2 tsp. baking powder
1/2 tsp. cinnamon
1 c. chocolate chips
4 tbsp. cocoa
2 c. finely grated zucchini

Preheat oven to 350F. Grease a 9" x 12" pan. In a mixing bowl cream butter, oil and sugar. Add eggs, vanilla and milk and beat till smooth. Mix dry ingredients together, add to creamed mixture and mix well. Stir in zucchini and chocolate chips. Bake 40-45 min or until done.