Peanut Muffins
["1 c. sugar", "2 Tbsp. butter", "1 egg", "3/4 c. milk", "2 to 3 tsp. baking powder", "1 1/2 c. flour", "1/4 tsp. salt", "1/4 tsp. vanilla"]
["Mix and bake in muffin tins in moderate oven.", "When cool dip muffins in thin icing made with confection sugar and milk.", "Then dip in ground peanuts."]
["sugar", "butter", "egg", "milk", "baking powder", "flour", "salt", "vanilla"]