Prepare the Crust: In a bowl, combine the graham cracker crumbs and melted butter. Mix until the crumbs are fully coated. Divide the mixture evenly into four dessert jars, pressing it tightly at the bottom to form a crust layer.
Make the Cheesecake Filling: In a large mixing bowl, beat the softened cream cheese until smooth. Add in the pumpkin puree, sugar, vanilla extract, cinnamon, nutmeg, and ginger. Continue beating until fully combined.
Incorporate the Eggs: Add the eggs one at a time, mixing well after each addition, until the mixture is smooth and creamy.
Layer the Cheesecake: Spoon the pumpkin cheesecake filling over the crust in each jar, filling them to about three-quarters full.
Bake the Cheesecakes: Preheat the oven to 325°F (160°C). Place the jars in a baking dish and add hot water to the dish until it reaches halfway up the sides of the jars to create a water bath. Bake for 25-30 minutes or until the centers are set but slightly jiggly.
Cool Down: Carefully remove the jars from the oven and water bath. Let them cool at room temperature for about 30 minutes, then refrigerate for at least 4 hours or overnight.
Garnish & Serve: Before serving, top each cheesecake jar with whipped topping and sprinkle crushed pecans on top for extra flavor and crunch.