Preheat oven to 325°F (160°C).

Grease and flour loaf pans.

In a mixing bowl, beat eggs.

Add milk, sugar, zucchini and vanilla to the beaten eggs.

In a separate bowl, cream together margarine and sugar.

Sift together flour, cocoa, baking powder, cinnamon, soda, and cloves.

Add the sifted dry ingredients to the creamed mixture.

Add chocolate chips.

Mix well until all ingredients are combined.

Pour batter into prepared loaf pans.

Bake for 45 minutes or until a toothpick inserted into the center comes out clean.

Let cool for a few minutes before slicing and serving.