Brown Sugar Crumb Topping Blueberry Muffins!!! Recipe

• 1¾ cups flour – sifted
• ¼ cup sugar
• 1 tablespoon baking powder
• 2 eggs
• 3 tablespoon butter
• ¾ cup sour milk – (add 1 tbs. vinegar to milk and let sit for 15 minutes)
• 1 cup frozen blueberries lightly floured
• Topping:
• ¼ cup brown sugar
• 3 tablespoons butter
• 3 tablespoon flour

Directions