01 - Preheat oven to 325°F. Line a 12-cup muffin tin with paper liners.
02 - In a mixing bowl, combine graham cracker crumbs, melted butter, and sugar until evenly moistened.
03 - Divide the crumb mixture evenly among the lined muffin cups, pressing firmly into the bottom to create a compact crust layer.
04 - In a separate bowl, beat softened cream cheese and sugar together until smooth and creamy.
05 - Add the egg and vanilla extract, mixing until just combined. Gently fold in the sour cream until evenly incorporated.
06 - Spoon the cheesecake batter evenly over each crust, filling nearly to the top. Smooth the surface with a spatula.
07 - Bake for 18 to 20 minutes, until the centers are set but still have a slight jiggle when gently shaken.
08 - Remove from the oven and allow the cheesecakes to cool in the muffin tin for 15 minutes.
09 - Transfer to a wire rack to cool completely, then refrigerate for at least 1 hour before adding toppings and serving.