You will need to have some type of cracker or cookie crumb for the base of these crunchy peanut butter bars. If you prefer not to use graham crackers, you can try any of the following instead: Nilla Wafers Oreo Cookies Gingersnaps Chocolate wafer cookies Nutter Butter cookies (for the REAL peanut butter lover!) And, you can make gluten free peanut butter bars by using gluten-free graham crackers. Or, for a slightly different taste, you can try crushed pretzels for a pretzel crust — the salty and sweet combination is delicious!!