Lemon Poppy Seed Muffins Recipe

2 cups flour
1 t baking soda
1 t baking powder
1/4 t salt
1/2 cup margarine
3/4 cup sugar
2 eggs
2/3 cup sour cream
1/4 cup fresh lemon juice
1 t vanilla
3 T poppy seeds
grated peel of one lemon

Stir together flour, baking powder, baking soda, and salt. Cream margarine and sugar until fluffy, then add eggs one at a time. Add flour mixture alternately with sour cream, lemon juice, and vanilla; mix until just blended. Fold in poppy seeds and lemon peel. Put into 12 muffin cups and sprinkle tops with sugar if desired.
Bake at 375 degrees for 18-20 minutes.