Preheat oven to 400 degrees.
Grease and flour a 12-cup muffin pan.
In a small saucepan melt the butter.
In a mixing bowl combine all but 1/4 cup of
flour with the baking powder, salt, and sugar.
In a separate bowl blend together the milk with the eggs.
In a small bowl toss the blueberries with
the remaining 1/4 cup of flour.
Add the melted butter to the egg mixture.
Mix the dry ingredients into the batter.
Gently stir in the blueberries.
Spoon equal amounts of blueberry muffin batter
into the muffin tin.
Bake at 400 degrees for 15 to 20 minutes.
Check for doneness with a toothpick.