01 - Preheat oven to 320°F. Line the base of a 9-inch springform pan with parchment paper.
02 - Crush the gingernut biscuits into fine crumbs using a food processor or by placing them in a sealed bag and crushing with a rolling pin. Mix thoroughly with melted butter.
03 - Press crumb mixture firmly into the base of the prepared pan. Refrigerate while preparing the filling.
04 - In a large bowl, beat cream cheese and brown sugar until smooth and creamy.
05 - Add eggs one at a time, beating well after each addition.
06 - Mix in sour cream, flour, ground ginger, cinnamon, nutmeg, cloves, salt, molasses, and vanilla extract until just combined.
07 - Pour the filling onto the chilled base, tapping the pan gently to eliminate air bubbles.
08 - Bake for 55 to 65 minutes until edges are set but the center retains a slight wobble.
09 - Turn off the oven, leave the door slightly ajar, and cool cheesecake inside for 1 hour to prevent cracking.
10 - Chill in refrigerator for at least 4 hours or preferably overnight until fully set.
11 - Before serving, spread or pipe whipped cream over the cheesecake and garnish with mini gingernut cookies or crushed gingernuts.