01 -
Combine graham cracker crumbs with melted unsalted butter in a bowl until evenly coated. Firmly press mixture into a 23 cm pie dish, forming a smooth, compact crust. Chill in the refrigerator for at least 30 minutes to set.
02 -
In a large bowl, beat softened cream cheese until smooth and fluffy. Gradually add sweetened condensed milk, blending until homogenous. Stir in lemon juice, lemon zest, and caster sugar, mixing thoroughly until silky.
03 -
In a medium saucepan, whisk together heavy cream, sour cream, cornstarch, and extra lemon juice. Cook over medium heat, stirring constantly, until the mixture thickens slightly, about 5–7 minutes. Dissolve powdered gelatin in hot water, then add to the saucepan, stirring well to combine and activate.
04 -
Remove saucepan from heat and let cool slightly. Fold in whipped topping to achieve a light texture; gently mix in fresh blueberries. Spoon the filling over the prepared crust, smoothing the surface with a spatula.
05 -
Refrigerate pie for at least 4 hours or overnight until well set. Before serving, garnish with additional blueberries, lemon zest, and white chocolate chips if desired. Serve chilled.