Preheat oven to 350 degrees.Grease a muffin tin and set aside. Grate zucchini, press water out on a towel and set aside. Whisk together sugar, butter, vanilla and eggs and set aside. Sift together flour, baking soda, baking powder and the spices. Add the dry ingredients to the wet ingredients and stir to combine well. Stir in the grated zucchini, then the nuts and the chocolate.