Best Blueberry Muffins
["1/2 c. butter or margarine, room temperature", "1 c. sugar", "2 large eggs", "1 tsp. vanilla", "2 tsp. baking powder", "1/4 tsp. salt", "2 c. all-purpose flour", "1/2 c. milk", "2 1/2 c. fresh blueberries"]
["Heat oven to 375\u00b0.", "Grease 18 regular-size muffin cups (12 if you want large muffins) or line with paper or foil baking cups. In a medium-size bowl, beat butter with a wooden spoon or electric mixer until creamy.", "Add sugar and beat until pale and fluffy. Add eggs, one at a time, beating after each addition.", "Beat in vanilla, baking powder and salt.", "Mash 1/2 cup blueberries and stir into the batter.", "With a rubber spatula, fold half the flour, then half the milk into the batter.", "Repeat with remaining flour and milk.", "Fold in remaining fresh blueberries.", "Spoon batter into muffin cups.", "Sprinkle with topping."]
["butter", "sugar", "eggs", "vanilla", "baking powder", "salt", "flour", "milk", "fresh blueberries"]