Line two standard 12-count muffin pans with cupcake liners.
Ensure your refrigerator has enough space to accommodate both pans as they will need to be chilled later.
If your graham crackers aren't already crumbs, pulse them in a food processor until fine.
Transfer the crumbs to a medium bowl and mix in the brown sugar and melted butter until the mixture resembles wet sand.
Spoon 1 and 1/2 tablespoons of the crust mixture into each cupcake liner and press down firmly with the back of a spoon speed until smooth and creamy, scraping down the sides as necessary.
Using a hand mixer or stand mixer fitted with a whisk attachment, whip the cold heavy cream to stiff peaks on medium-high speed for about 3 minutes. Set aside.
In a separate bowl, beat the cream cheese and granulated sugar together on medium
Add the sour cream, lemon juice, and vanilla extract to the cream cheese mixture.
Beat on medium-high speed until fully combined and smooth, ensuring there are no lumps. If lumps persist, continue beating until smooth.
Gently fold the whipped cream into the cheesecake mixture using a silicone spatula, mixing slowly to retain the airiness of the whipped cream.
Use a spoon or a piping bag to transfer about 2 tablespoons of the cheesecake filling onto each crust.
Piping is recommended for neatness and ease.
Smooth the tops with the back of a spoon.
Refrigerate the mini cheesecakes in the pans for at least 3 hours or up to 2 days.
If refrigerating for more than 3 hours, cover with aluminum foil or plastic wrap to prevent drying.
Keep the cheesecakes refrigerated until ready to serve.
They will begin to soften and stick to the liners after 30-60 minutes at room temperature.
Serve with optional toppings such as fresh fruit, chocolate ganache, or caramel sauce.
Cover and store any leftover mini cheesecakes in the refrigerator for up to 5 days.