Press graham cracker crust into 9 x 9 x 2-inch pan. Heat oven to 350°. Beat cream cheese slightly. Add eggs, 3/4 cup sugar and 2 teaspoons vanilla; beat well with electric mixer. Spread in pan. Bake 30 minutes. Topping: Blend sour cream, 2 tablespoons sugar and 2 teaspoons vanilla until smooth. Spread topping over cheesecake when it comes out of oven. Cool, then refrigerate several hours or overnight.