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, combine graham cracker crumbs, sugar, and melted butter until evenly mixed. Press firmly into the bottom of the prepared pan. Bake for 8 minutes, then set aside to cool.
03 - Combine raspberries, sugar, and lemon juice in a small saucepan. Cook over medium heat, stirring and mashing, until raspberries break down and mixture thickens, about 5 minutes. Strain through a fine mesh sieve to remove seeds. Allow to cool.
04 - Beat cream cheese and sugar with an electric mixer until smooth. Add eggs one at a time, mixing well after each addition. Blend in vanilla extract. Gently fold in chopped white chocolate.
05 - Pour cheesecake filling over the cooled crust. Drop spoonfuls of raspberry sauce across the surface. Gently swirl with a knife or skewer to create a marbled pattern.
06 - Bake for 35-37 minutes, until edges are set but the center remains slightly jiggly.
07 - Cool completely at room temperature, then refrigerate for at least 2 hours before slicing into bars.