Preheat oven to 350°F. Line a 9x9 inch baking pan with parchment paper.
Make crust (5 min): Add the gingersnaps to the bowl of a food processor or high-speed blender and pulse in 2-3 second increments to crush into fine crumbs. Stir in the sugar, flour, and butter.
10-12 ounces Gingersnap cookies, 1/4 cup granulated sugar, 1/4 cup all-purpose flour, 1/2 cup unsalted butter
Bake the crust (12 min): Press the gingersnap mixture firmly into the prepared pan using a rubber spatula or the bottom of a measuring cup. Bake for 12 minutes.
Mix the filling (5 min): While the crust bakes, add all of the pumpkin filling ingredients to a large bowl and whisk well until combined and smooth.
1 (15-oz) can pumpkin puree, 1 cup light brown sugar, 1/2 teaspoon salt, 2 teaspoons pumpkin pie spice, 1 Tablespoon cornstarch, 1 1/3 cups half and half, 3 eggs
Bake the pumpkin bars (55 min): Pour the pumpkin filling over the partially baked crust. Bake for 50-55 minutes, or until the edges and middle are set and no longer jiggles when you nudge it. Tent the edges with foil as needed.
Cool and slice (2 hrs): Allow the bars to cool completely then remove them from the pan and cut them into 16 squares using a sharp hot knife. Chill in the fridge to speed up the cooling process
To serve: Chopped pecans, homemade whipped cream, cinnamon sugar, and/or vanilla ice cream for serving