01 - Preheat oven to 325°F. Line a 9x9-inch baking pan with parchment paper, leaving an overhang for easy removal.
02 - Combine graham cracker crumbs, sugar, and melted butter in a bowl. Press mixture firmly and evenly into the bottom of the prepared pan. Bake for 10 minutes, then allow to cool slightly.
03 - Combine raspberries, sugar, and lemon juice in a small saucepan. Cook over medium heat, stirring and mashing until thickened, approximately 5 minutes. Strain through a fine mesh sieve to remove seeds and let cool.
04 - Beat cream cheese and sugar until smooth and creamy. Add eggs one at a time, mixing thoroughly after each. Incorporate vanilla extract and sour cream. Fold in melted white chocolate until just combined.
05 - Pour cheesecake filling over the cooled crust. Spoon raspberry puree over the surface and use a toothpick or skewer to gently swirl the layers.
06 - Bake for 30 to 35 minutes until the center is just set and edges are slightly puffed. Avoid overbaking.
07 - Allow to cool completely at room temperature, then refrigerate for at least 3 hours before slicing into bars.