Preheat your oven to 325°F (160°C).
In a bowl, mix graham cracker crumbs, sugar, and melted butter until combined.
Press the mixture into the bottom of lined muffin tins to form the crust.
In a large mixing bowl, beat cream cheese until smooth.
Gradually add sugar and vanilla extract, mixing well.
Add eggs one at a time, mixing until fully incorporated.
Stir in sour cream until smooth.
Pour the cheesecake mixture over the crusts in the muffin tins.
Bake for 20-25 minutes until the centers are set but slightly jiggly.
Remove from the oven and let cool, then refrigerate for at least 4 hours before serving.