Yam and Pumpkin Muffins

1-1/2 cups of flour (self-rising) When using plain flour, add 1/2 teaspoon baking soda 1/2 tsp salt 1/4 cup shortening or butter 1 egg 1 cup milk 1/2 cup Trader Joes Pumpkin Butter 1/2 cup Bruce’s Mashed Yams Pour in muffin pans and bake 20 to 30 minutes at 350F. Makes 2 dozen