Grandma Kretchmer'S Blueberry Cake
["1/4 c. butter", "2/3 c. sugar", "1 egg", "1 c. milk", "2 1/4 c. flour", "4 tsp. baking powder", "1/2 tsp. salt", "1 1/2 c. blueberries"]
["Cream butter and sugar.", "Add the egg.", "Add flour, baking powder and salt alternately with milk.", "Add blueberries.", "Bake at 400\u00b0 for 35 minutes in 9 x 9-inch pan."]
["butter", "sugar", "egg", "milk", "flour", "baking powder", "salt", "blueberries"]