1/2 cup butter 
1 1/4 cups sugar 
2 eggs 
1 1/4 cups canned sweet potatoes, mashed 
11/2 cups all-purpose flour 
2 teaspoons baking powder
1/4 teaspoon salt 
1 teaspoon cinnamon 
1/4 teaspoon nutmeg 
1 cup milk 
1/4 cup pecans or walnuts, chopped 
1/2 cup raisins, chopped 

Preheat oven to 400  F. Grease 1-1/2 inch muffin tins. Cream the butter and sugar. Add the eggs and mix well. Blend in the sweet potatoes. Sift the flour with the baking powder, salt, cinnamon, and nutmeg. Add alternately with the milk. Do not overmix. Fold in the nuts and raisins. Fill the greased muffin tins 2/3 full. Bake at 400 F for 25 minutes. Can be frozen and reheated.