Preheat the oven to 350 degrees. Grease a 9x5-inch loaf pan with butter or non-stick cooking spray and set aside.\nIn a medium bowl, whisk together the egg, sugars, oil, zucchini and vanilla until combined. \nIn a large bowl, combine the flour, baking powder, baking soda, India spice, salt and cinnamon.\nPour the wet ingredients into the dry ingredients and mix with a large wooden spoon or rubber spatula until combined. Gently fold in the chocolate chips, if using. \nSpread batter into the prepared loaf pan and bake until golden brown and a toothpick inserted into the center comes out clean, about 45-50 minutes. \nRemove from the oven and set onto a wire rack to cool completely. Let cool for at least 1 hour before removing from loaf pan.