Preheat oven to 325°F (163°C).
In a mixing bowl, beat cream cheese and sugar until smooth.
Add vanilla extract, egg, sour cream, and flour, mixing until well combined.
Pour the mixture evenly into mini graham cracker crusts.
Bake for 15-18 minutes or until centers are set. Let cool completely.
Refrigerate for at least 2 hours before serving.
Before serving, sprinkle sugar on top of each cheesecake and torch until caramelized.