Brown Sugar Muffins

1/2 butter softened
1 c. brown sugar
1 egg
1 t vanilla
1 c. milk
2 c. flour
1/4 t salt
1 t baking powder
Cream butter and sugar, beat in egg and vanilla. Stir in milk. Add dry ingredients and stir. Pour into greased muffin pan. (makes about 12 regular sized muffins) Bake at 375 for 15 minutes.