Preheat the oven to 350°F (175°C) and lightly grease a 9x13 inch baking dish.
Mix graham cracker crumbs and melted butter together in a bowl until well combined, then press the mixture into the bottom of the prepared baking dish.
Bake the crust in the preheated oven for 10 minutes. Remove and let it cool completely.
In a large bowl, beat the cream cheese until smooth. Add the powdered sugar and mix until combined.
Gently fold in the melted white chocolate and half of the cool whip into the cream cheese mixture.
Spread the cream cheese mixture over the cooled crust evenly.
In a separate bowl, combine blueberries and lemon juice, then evenly distribute them over the cream cheese layer.
Spread the remaining cool whip on top of the blueberry layer. Cover and refrigerate for at least 2 hours before serving.
Notes
For best results, let the lasagna chill overnight for the flavors to meld.