Chocolate Zucchini Cake Contributed by docj

2 1/2 cups sifted flour
1/4 cup baking cocoa
1 tsp. baking soda
1 tsp. salt
1/2 cup butter or regular margarine
1/2 cup cooking oil
1 3/4 cups sugar
2 eggs
1 tsp. vanilla
1/2 cup buttermilk
2 c. grated unpared zucchini
1 6-oz pkg semisweet chocolate pieces
3/4 cup chopped walnuts

Sift together flour, cocoa, baking soda and salt; set aside.

Cream together butter, oil and sugar in mixing bowl until light and fluffy, using electric mixer at medium speed. Beat in eggs, one at a time, beating well after each addition. Blend in vanilla.

Add dry ingredients alternately with buttermilk to creamed mixture, beating well after each addition. Stir in zucchini. Pour batter into greased 13" x 9" x 2" baking pan. Sprinkle with chocolate pieces and walnuts.

Bake in 325 degree oven 55 minutes or until cake tests done.

Cool in pan on rack. Cut in squares.