How do you know when a pumpkin pie is done? For one thing, open the oven door. Afterward, slowly nudge the pumpkin pie. Remember, never shake it. In so doing, you should observe that the pumpkin pie must be firm in the outer edges. Also, the middle is usually a bit jiggly. Although, it must not be unsteady or sloshy. Keep in mind that this technique is the same when checking the cheesecake’s doneness.