01 - Preheat oven to 325°F. Line an 8-inch square baking pan with parchment paper, leaving an overhang on two sides.
02 - Mix graham cracker crumbs, sugar, melted butter, and salt. Press evenly into the bottom of the prepared pan. Bake 10 minutes. Cool slightly.
03 - Combine raspberries, sugar, and lemon juice in a saucepan over medium heat. Cook 3 to 5 minutes, mashing berries until thickened. Strain to remove seeds and cool.
04 - Beat cream cheese and sugar until smooth. Add eggs one at a time, mixing thoroughly. Stir in vanilla, lemon zest, lemon juice, and sour cream until homogenous.
05 - Pour cheesecake filling over cooled crust and smooth surface evenly.
06 - Spoon raspberry sauce atop the filling. Swirl gently with a toothpick or knife to create a marbled pattern.
07 - Bake for 30 to 35 minutes until edges are set and center slightly wobbly.
08 - Cool to room temperature then refrigerate at least 2 hours before cutting into sixteen squares.