Kara's Chocolate Chip Zucchini Cake

1/2 c butter                            4 T cocoa

1/2 c oil                                 1/2 tsp cinnamon

1 3/4 c sugar                          1 tsp salt

2 eggs                                    1 tsp bkg soda

2 c grated zucchini                1 tsp bkg powder

2 1/2 c flour                           3/4 c chopped walnuts

1 tsp vanilla                           3/4 c chocolate chips

1/2 c sour milk                       3/4 c brown sugar

Mix butter, oil, white sugar, eggs, then mix in zucchini. 

Add flour, vanilla, sour milk, cocoa, cinnamon, salt, bkg soda, bkg powder & stir.  

Spread mixture into greased 9x13,  filling only 1/2 full as cake rises.  

Top with brown sugar, chocolate chips & walnuts. 

Bake @ 350* for 45 min or until done.