In a bowl, combine the graham cracker crumbs and melted butter until evenly coated.
Press the mixture into the bottom of a 9-inch springform pan. Chill while you prepare the filling.
In a large mixing bowl, beat the cream cheese and powdered sugar until smooth.
Add lemon zest, lemon juice, and vanilla extract. Mix until combined.
In a separate bowl, whip the heavy cream to stiff peaks.
Gently fold the whipped cream into the cream cheese mixture.
Spread the filling evenly over the crust.
Refrigerate at least 6 hours or overnight.
Garnish with lemon slices or zest before serving.