Chocolate Zucchini Cake

Great for using all those zucchini in the summer.  Another moist cake that doesn't need frosting.  The chocolate chips add the sweetness on top.

1 cup brown sugar, packed
1/2 cup sugar
1/2 cup butter, softened
1/2 cup oil
3 eggs
1 tsp. vanilla
1/2 cup buttermilk (or 1/2 cup milk + 1 Tbsp. vinegar)
2 1/2 cups flour
1/4 cup cocoa
2 tsp. baking soda
1/2 tsp. all spice
1/2 tsp. cinnamon
1/2 tsp. salt
2 cups peeled then grated zucchini
1 cup semi-sweet chocolate chips

Cream butter and sugars together in mixer.  Add oil, eggs, vanilla & buttermilk;  stir well.  Mix dry ingredients together in a seperate bowl;  add to sugar mixture.  Beat well.  Stir in zucchini.  Pour batter into greased and floured (or sprayed with Pam) 13x9 pan and sprinkle chocolate chips on top.  Bake at 325 for 45 minutes or until cake tests done with a toothpick.  Freezes well.