Zucchini Chocolate Chip Cake

This is a very heavy, rich chocolate cake from Aunt Anne O'Brien which she brought to an O'Brien reunion many years ago. It is great for large gatherings because it is so heavy and rich. A small piece will curb the chocolate craving.

Cream:
1 Stick Butter
1/2 C Oil
1 3/4 C Sugar

Add:
2 Eggs
1 tsp Vanilla
1/2 C Sour Milk (1 TBSP vinegar + enough milk to make 1/2 cup)

Mix in:
2 1/2 C Flour
1/2 tsp Cloves
1/2 tsp. Cinnamon
1 tsp Salt
1/2 tsp Baking Powder
4 TBSP Cocoa
2 C Zucchini, shredded
Walnuts, chopped (optional)

Pour into 9x13 pan sprayed with PAM.

Sprinkle Semi-Sweet Chocolate Chips on top.

Bake @325F for 40 minutes.