1 . For crust , combine graham cracker crumbs and melted butter . 2 . Stir until well combined . 3 . Press onto bottom and about 2-1 / 2 inches up the sides of a 9x3-inch springform pan . 4 . Mix cream cheese , sugar , flour , and vanilla . 5 . Beat with an electric mixer until fluffy . 6 . Add eggs and egg yolks , beating on low speed just until combined . 7 . Stir in whipping cream and lemon peel . 8 . Pour into pan . 9 . Place pan in a shallow baking pan in the oven . ( Does not mention anything about a water bath ) 10 . Bake in a 325 degree F oven about 1-1 / 2 hours or until center appears nearly set when shaken .