In A bowl, mix together the dry ingredients – all purpose flour, sugar, cinnamon, mace, nutmeg, clove powder, salt, baking soda and baking powder and set aside.
In another bowl, mix eggs, pumpkin and melted butter.
Add the wet ingredients to the dry and mix well. Add chocolate pieces and mix again.
Fill the muffin tins to till two thirds full. Bake the muffins in a 350 degree F oven for 20 to 25 minutes. Insert a wooden toothpick into centers of the muffins to check if it comes out clean.