Impossible Pumpkin Pie
["1 (16 oz.) can pumpkin", "1 (13 oz.) can evaporated milk", "2 eggs", "2 tsp. vanilla", "1/2 c. Bisquick", "3/4 c. sugar", "2 1/2 tsp. pumpkin pie spice", "2 Tbsp. butter"]
["Grease 1 (9-inch) pie pan.", "Blend all ingredients and pour in pan.", "Bake at 350\u00b0 for 55 to 60 minutes.", "Pie is done when knife inserted comes out clean.", "Cool.", "Serve with Cool Whip."]
["pumpkin", "milk", "eggs", "vanilla", "Bisquick", "sugar", "pumpkin pie spice", "butter"]