01 - Preheat oven to 325°F. Line a 12-cup muffin tin with paper liners.
02 - Place one vanilla wafer cookie, flat side down, in the bottom of each liner.
03 - In a large bowl, beat cream cheese and granulated sugar until smooth and creamy.
04 - Add eggs one at a time, mixing well after each addition.
05 - Mix in vanilla extract, sour cream, flour, and salt until just combined.
06 - Divide batter evenly among muffin cups, filling each about 3/4 full.
07 - Bake for 16 to 18 minutes, until centers are just set and slightly wobbly.
08 - Let cool in pan for 10 minutes, then transfer to wire rack to cool completely.
09 - Mix sour cream and powdered sugar until smooth. Spoon dollop onto each cooled cheesecake and garnish with berries or preserves.
10 - Refrigerate for at least 30 minutes before serving.