Peanut Butter Muffins

1 egg
1 cup skim milk or low-fat yogurt
1/4 cup peanut butter
1/3 cup margarine, melted
1/3 cup sugar
2 cups flour
3 tsp baking powder

Recipe Directions
mix the first 5
add the rest until just blended

bake at 200 deg cel for 15 min