Roll crackers; mix sugar and butter together. Add cracker crumbs and mix well. Line a 10 inch pie pan with graham cracker crust mix. Beat cream cheese thoroughly until fluffy. Add well beaten eggs, sugar and other ingredients. Pour into crust. Bake exactly 20 minutes in a pre-heated oven at 375 degrees F. Remove from the oven and spoon topping carefully over this.
For Topping: the vanilla is added to sour cream before spooning on pie. Glaze in oven at 475 degrees F for 5 minutes more; watch carefully. Chill before serving.