Preheat the oven to 350°F (175°C). In a mixing bowl, combine graham cracker crumbs, melted butter, and sugar. Press the mixture into the bottom of a springform pan.

In a mixing bowl, beat together the baby Swiss cheese, cream cheese, sour cream, and sugar until smooth. Add eggs one at a time, mixing well after each addition. Stir in vanilla extract.

Pour the filling over the crust in the springform pan. Bake for 30 minutes or until the center is set. Allow to cool before serving.