Add butter into crushed cookies and mix. Place into a butter baking pan and press down to even out. Push cookies mix and press all around the baking pan. (I placed a piece of baking paper on the bottom of the pan so that the crust wouldnt stick). Place into oven and bake for about 20 minutes or you can place it in the refrigerator for 1 hr. This is done so that the crust becomes firm.