here is the one for the pumpkin muffins....which can also be made out of sweet potato (which i haven't tried yet)
also I make them in mini muffin pans (less waste with the kids) and when I make it mini muffins... I cut this in half and it makes two trays of the mini ones...(also I always use liners... if not make sure you spray/greese the pan.....
Pumpkin/Sweet Potato Chocolate Chip Muffins-makes 36
4 eggs
2 cups sugar
1 (16 oz.) can pureed pumpkin or 16 oz. mashed sweet potato (without butter, salt, or milk)
3/4 cup milk
3/4 cup oil
2 cups all-purpose flour
1 cup whole wheat flour
2 teaspoons baking soda
2 teaspoons baking powder
1 teaspoon ground cinnamon
1 teaspoon salt
1 package chocolate chips (I often use less when I happen to have only a partial bag)
In a large mixing bowl, beat eggs, sugar, pumpkin, milk, and oil until smooth. In a separate bowl, whisk dry ingredients together. Add dry ingredients to liquid ingredients, and stir just until combined. Fold in chocolate chips. Fill greased or paper-lined muffin cups 3/4 full. Bake 16-20 minutes at 350 degrees.