01 - Preheat oven to 350°F. Line a 9-inch square baking pan with parchment paper, leaving an overhang for easy removal.
02 - In a medium bowl, mix graham cracker crumbs, sugar, and melted butter until combined. Press evenly into the bottom of the prepared pan. Bake for 8 minutes, then set aside to cool slightly.
03 - In a small saucepan, combine raspberries, sugar, and lemon juice. Cook over medium heat, stirring and mashing, until the raspberries break down and the mixture thickens (about 5 minutes). Strain through a fine mesh sieve to remove seeds. Let cool.
04 - In a large bowl, beat cream cheese and sugar with an electric mixer until smooth. Add eggs one at a time, mixing well after each addition. Mix in vanilla extract. Fold in chopped white chocolate.
05 - Pour the cheesecake filling over the cooled crust. Spoon small dollops of raspberry sauce over the surface, then swirl gently with a knife or skewer for a marbled effect.
06 - Bake for 35–37 minutes, or until the edges are set but the center is slightly jiggly.
07 - Cool completely at room temperature, then refrigerate for at least 2 hours before slicing into bars.