Pumpkin Chocolate Chip Muffins

Note: I usually double this recipe

1 2/3 c. flour
1 c. sugar
1 t. baking soda
1/2 t. baking powder
1 1/2 t. cinnamon
1/4 t. nutmeg
1/4 t. cloves
3/4 t. mace
1/2 t. salt
1 c. canned pumpkin
2 eggs
1 stick butter or margarine, melted
6 oz. chocolate chips

Preheat oven to 350. Combine all dry ingredients in a bowl. Mix well. Combine all wet ingredients in a bowl. Add wet to dry and partially mix. Add chocolate chips and mix until lightly combined. Bake in 12 cup muffin tin for 20-25 minutes. Be careful not to overbake.