Line an 8x8-inch baking pan with parchment paper.
Combine the graham cracker crumbs, melted butter, and sugar until evenly moistened.
Firmly press the mixture into the bottom of the prepared pan to form the crust.
Refrigerate the crust while preparing the filling.
Beat the softened cream cheese until smooth and creamy.
Add the powdered sugar, vanilla extract, and lemon juice. Mix until fully combined.
In a separate bowl, whip the cold heavy cream until stiff peaks form.
Gently fold the whipped cream into the cream cheese mixture until smooth and fluffy.
Spread the filling evenly over the chilled crust.
Smooth the top using an offset spatula.
Cover and refrigerate for at least 6 hours or overnight until fully set.
Slice into 16 bars and garnish with your favorite toppings before serving.