Preheat Oven & Prepare Muffin Tin: Preheat your oven to 325°F (163°C). Line a muffin tin with paper liners or lightly grease it to prevent the mini cheesecakes from sticking.
Mix the Filling: In a large mixing bowl, beat the cream cheese and granulated sugar together until smooth and creamy. Add the eggs, one at a time, beating well after each addition. Stir in the vanilla extract, lemon juice, and flour until fully combined. Lastly, fold in the sour cream and mix until smooth.
Fill Muffin Cups: Evenly pour the cheesecake batter into each muffin cup, filling each one almost to the top. Smooth the tops with a spatula.
Bake: Bake for 18-20 minutes, or until the edges are set and the centers are slightly jiggly. Be careful not to overbake, as the cheesecakes will continue to set as they cool.
Cool & Chill: Allow the mini cheesecakes to cool to room temperature, then refrigerate them for at least 2 hours, or preferably overnight, to let them fully set.
Serve & Enjoy: Once chilled, remove the mini cheesecakes from the muffin tin and serve. Garnish with fresh berries, whipped cream, or a drizzle of caramel sauce if desired.