Pennsylvania Cheesecake
["4 (8 oz.) pkg. cream cheese", "6 eggs", "1 1/2 c. sugar", "2 tsp. vanilla"]
["Beat until smooth (high speed of mixer or food processor). Grease a 9 x 13-inch pan with butter.", "Bake at 350\u00b0 for 40 to 50 minutes until edges are brown. (Bake 35 to 40 minutes if using two 8 x 8-inch square pans.)", "Remove from oven and let cool 10 minutes.", "Spread sour cream mixture on top and place back in a 350\u00b0 oven for 10 minutes."]
["cream cheese", "eggs", "sugar", "vanilla"]