01 - Preheat oven to 325°F. Line an 8-inch square baking pan with parchment paper, ensuring an overhang for easy removal.
02 - In a medium bowl, combine gingersnap crumbs, light brown sugar, and melted butter until evenly mixed. Press mixture firmly into the bottom of the prepared pan. Bake for 8 minutes, then remove and set aside.
03 - In a large bowl, beat cream cheese and sugar until smooth and creamy. Incorporate sour cream and molasses, beating until fully blended.
04 - Add eggs one at a time, mixing thoroughly after each addition. Stir in vanilla extract, ground ginger, cinnamon, nutmeg, cloves, and salt until just combined, avoiding overmixing.
05 - Pour cheesecake filling evenly over the pre-baked crust, smoothing the top. Bake for 30 to 32 minutes until center is set and edges appear slightly puffed.
06 - Remove from the oven and cool to room temperature. Refrigerate for at least one hour before slicing into bars.
07 - Optionally, garnish bars with whipped cream and a light dusting of cinnamon or nutmeg before serving.