Preheat the oven to 350ºF. Grease a muffin pan with cooking spray.
In a large bowl, sift together the flour, baking powder, baking soda, salt, cinnamon, cloves, ginger and nutmeg. Set aside.
In the bowl of a stand mixer fitted with the paddle attachment, cream together the butter, sugar and vanilla until light and fluffy, about 2 minutes. Add the eggs, one at a time, then add the pumpkin.
Alternately add the dry ingredients and water to the bowl, beginning and ending with the dry ingredients. Blend the batter well, scraping down the sides as needed.
Stir in 1 cup of the chocolate chips then fill the muffin cups about 2/3 full. Sprinkle the tops of the batter with the remaining 1/4 cup of chocolate chips then bake the muffins for 18 10 20 minutes until a toothpick inserted comes out clean. Allow the muffins to cool in the pan for 5 minutes then transfer them to a rack to cool completely.