Best Ever Muffins
["1 3/4 c. sifted flour", "1/3 to 1/2 c. sugar", "2 1/2 tsp. baking powder", "3/4 tsp. salt", "1 egg, beaten", "3/4 c. milk", "1/3 c. salad oil", "1/3 to 1/2 c. blueberries"]
["Mix; leave batter lumpy.", "Bake at 400\u00b0."]
["flour", "sugar", "baking powder", "salt", "egg", "milk", "salad oil", "blueberries"]