Save the plastic cover of the graham cracker crust.Don't toss away the plastic cover of the store bought graham cracker crust. Save it and flip it over, making a lid for the pie.Ways to garnish the peanut butter pie:To garnish this pie you can drizzle some chocolate syrup, chop peanut butter cups, chopped peanuts or even crushed graham cracker crumbs.Can a chocolate cookie crust be used?I think using a chocolate cookie crust for this peanut butter pie would be DELICIOUS! Peanut butter and chocolate are perfect pairings.How do you store leftover pie?On the off chance, there is leftover pie, I store it in the aluminum pie pan that the crust came in, with the plastic lid in place. Store in the refrigerator for up to 4 days.