Line a 9x9 in pan with foil, keeping it hanging over the edges of the pan for easy removal, and spray with nonstick spray.
Pulse the graham crackers into a fine crumb using a blender or food processor.
Mix together the melted butter with the graham crackers.
Pour the graham cracker mixture into the bottom of the prepared pan.
Spread crumbs evenly and press down as tightly as you can. (The bottom of a flat cup works great for this)
Place in the fridge for 10 minutes, while preparing cheesecake layer.