Peanut Butter Banana Chocolate Chip Muffins

This is a recipe from our local health food store's monthly magazine. Banana chocolate chip muffins are already delicious--adding peanut butter makes them even more so :-)

1/2 cup brown sugar

1/4 cup butter

1/4 cup peanut butter or almond butter

1 large banana, mashed

1 egg

1 tsp vanilla

3/4 cup whole wheat flour or spelt flour

3/4 tsp baking powder

3/4 tsp baking soda

1/4 cup yogurt

1/3 cup ground milled flax

1/2 to 1 cup chocolate chips

In a large bowl, combine sugar, butter, nut butter, banana, egg and vanilla; mix until well blended. In separate bowl combine flour, baking powder and soda and milled flax. Add to batter and mix until just blended. Stir in yogurt and chocolate chips. Fill muffin cups half-full. Bake for about 15 minutes at 350 F.