01 - Preheat oven to 325°F (160°C) and line a 12-cup muffin tin with paper liners.
02 - Place one vanilla wafer cookie at the bottom of each paper liner to form the crust.
03 - In a medium bowl, beat cream cheese and sugar until smooth and creamy.
04 - Add mashed banana, vanilla extract, sour cream, and egg to the cream cheese mixture. Mix until fully combined and creamy.
05 - Divide the batter evenly among the prepared muffin cups, filling each nearly to the top.
06 - Bake for 18–22 minutes or until centers are set and edges appear slightly firm.
07 - Allow cheesecakes to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
08 - Refrigerate for at least 2 hours to set properly and develop flavors.
09 - Before serving, top each mini cheesecake with a dollop of whipped cream, sprinkle with crushed vanilla wafers, and add a fresh banana slice.