Chocolate Zucchini Cake with Orange Glaze

From Betty
2-1/2 cups sifted all purpose flour
1/2 cup cocoa
2-1/2 tsp. baking powder
1-1/2 tsp. baking soda
1 tsp. salt
1 tsp. cinnamon
3/4 cup butter
2 cups sugar
3 eggs
2 cups grated zucchini
2 tsp. grated orange peel
2 tsp. vanilla
1/2 cup milk
1 cup nuts (optional)

In a bowl combine first six ingredients, set aside. In a large bowl, beat butter with sugar until fluffy. Add eggs and beat until well mixed. Stir in zucchini, orange peel, and vanilla. Alternately stir in dry ingredients, milk and nuts. Pour into greased pan. Bake at 350℉ until done. Spread with glaze while still warm.

Glaze:
1 tbs. orange juice
1/2 tsp. grated orange peel
3/4 cup powdered sugar