Prepare the crust:

1. Step 1: Combine graham cracker crumbs, melted butter, and sugar.
2. Step 2: Press into a parchment-lined 9×13-inch baking pan.
3. Step 3: Bake for about 8–10 minutes at 325°F to help it firm up.

Make the filling:

1. Step 1: Beat softened cream cheese until smooth and fluffy.
2. Step 2: Add sugar, then eggs one at a time, mixing just until combined.
3. Step 3: Mix in pumpkin puree, vanilla, pumpkin spice, and a tablespoon of flour if using.

Bake:

1. Step 1: Pour the cheesecake filling over the baked crust.
2. Step 2: Bake at 325°F for 35–40 minutes, or until the edges are set but the center still slightly jiggles.
3. Step 3: Let cool at room temperature, then chill for at least 4 hours before slicing.