I remember the bakery box these came in and the delicious sugary crunch on top. They're terrific.
1/2 cup butter
1 1/4 cup sugar
Mix dry ingredients:
2 cups flour
1/2 t. salt
2 t. baking powder
Add dry ingredients to creamed mixture, alternating with 1/2 cup MILK.
Mash 1/2 cup blueberries. Add to muffin mix. Fold in additional 2 cups blueberries.
Fill muffin tins 2/3 full and sprinkle with 2 t. sugar. Bake at 375 for 25-30 minutes.