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 the mixture firmly and evenly into the bottom of the prepared pan. Bake for 10 minutes, then allow 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 and let cool.
04 - In a large bowl, beat cream cheese and sugar until smooth and creamy. Add eggs one at a time, mixing well after each addition. Stir in 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 top and gently swirl using a toothpick or skewer.
06 - Bake for 30 to 35 minutes until the center is set and edges are slightly puffed. Avoid overbaking.
07 - Let cool completely at room temperature, then refrigerate for at least 3 hours before cutting into bars.