Prepare the Muffin Pan: Line a 12-count muffin pan with cupcake liners.
Make the Crust: In a medium bowl, combine graham cracker crumbs, brown sugar, and melted butter. Mix until it resembles wet sand. Spoon 1 1/2 tablespoons of mixture into each muffin cup and press it down firmly.
Optional Step – Bake the Crust: For a sturdier crust, bake at 350°F (177°C) for 5 minutes, then cool for 10 minutes.
Make the Cheesecake Filling: Whip cold heavy cream into stiff peaks. In another bowl, beat cream cheese and sugar until smooth. Add sour cream, lemon juice, and vanilla extract, and mix until fully combined. Gently fold in the whipped cream.
Assemble: Spoon or pipe the cheesecake filling into each muffin liner on top of the crust.
Chill: Refrigerate for at least 3 hours until set.
Serve: Top with optional toppings like fresh berries, chocolate ganache, or fruit preserves before serving.