Preheat oven to 325°F (160°C). Grease a 9-inch springform pan.

In a medium bowl, combine graham cracker crumbs and melted butter. Press the mixture into the bottom of the prepared pan to form the crust.

In a large mixing bowl, beat cream cheese and sugar until smooth. Add eggs one at a time, mixing well after each addition. Mix in sour cream and vanilla extract until combined.

Fold in chopped Twix bars and pour the batter over the crust.

Bake for 55-60 minutes, or until the center is set. Allow the cheesecake to cool to room temperature, then refrigerate for at least 4 hours, or overnight.

Before serving, drizzle the cheesecake with caramel sauce and garnish with whipped cream. Additional Twix bars can be added on top for extra decoration.