Preheat the oven to 325°F (160°C).
In a bowl, mix graham cracker crumbs and melted butter until combined.
Press the mixture into the bottom of a muffin tin lined with paper liners.
In a large bowl, beat the cream cheese until smooth.
Add sugar and mix until well combined.
Incorporate sour cream and vanilla extract, mixing thoroughly.
Add eggs one at a time, mixing until just combined.
Pour the cream cheese mixture over the crust in each muffin cup.
Bake for 20-25 minutes, or until the centers are set.
Allow to cool at room temperature, then refrigerate for at least 2 hours.