Sweet Potato Muffins

Using white, O'Henry sweet potatoes I made this recipe, adapted from 2 other recipes. Orange sweet potatoes or pumpkin would also work.
Yield: 12 muffins + mini cake

1 C white flour
1 C whole wheat flour
1 t baking soda
1/4 t salt
1 t cinnamon
1/2 t each nutmeg & cloves
1 1/4 C brown sugar
1/4 C canola oil
1/4 C plain yogurt (I used Greek non-fat strained yogurt)
2 eggs
1/2 C milk
2 t vanilla
1 1/2 C cooked sweet potatoes, mashed

Preheat oven to 350. Stir together sugar, oil, yogurt, eggs, milk, vanilla, & sweet potato. Add dry ingredients and taste for spices and salt. Divide into greased muffin tins and bake for 15-25 minutes, or until done.