Blueberry muffins

Recipe taken from the book Muffin Mania (by Cathy Prange and Joan Pauli ,1982)

1 3/4 cup all purpose flour
1/2 cup white sugar
3 tsp. baking powder
1 cup milk
1/2 cup melted butter
1 egg
1/2 tsp salt
1 cup frozen blueberries

Stir together dry ingredients and add frozen blueberries.

Combine egg, milk and melted butter and stir into flour mixture and blueberries stirring just to moisten. Do not beat.

Bake 375º - 20 minutes