Preheat oven to 325°F (160°C). Line a muffin tin with paper liners.
In a bowl, mix graham cracker crumbs, sugar, and melted butter. Press about 1 tablespoon into each liner to form crusts.
In a large bowl, beat cream cheese until smooth. Add sugar and mix well.
Add eggs one at a time, mixing after each. Stir in vanilla and sour cream.
Spoon filling over crusts until 3/4 full.
Bake for 18–20 minutes or until centers are just set.
Cool completely, then refrigerate at least 2 hours before serving.
Top with fruit, chocolate, or whipped cream as desired.