Vanilla And B-Bob's Recipe Box Links Blueberry Muffins

3 cups sifted flour
4 1/2 TSP baking powder
1/4 CUP butter, melted
1 1/2 CUPS milk
1 TSP salt
1/2 CUP sugar
2 eggs
1 1/4 CUPS blueberries

Mix and sift dry ingredients. Add eggs, milk and melted butter. Fold in berries. Mix quickly and thoroughly. Pour into well-greased muffin pans. Bake in a hot oven (400 degrees) for 20 minutes.