Graham crackers are crisp, sweet, flat cookies made from coarsely ground whole-wheat flour and usually honey, and named after 19th-century American nutritionist Sylvester Graham. They are eaten out of hand or are crumbled or crushed and used to add texture and subtle sweetness to batters, crusts, and toppings. Once opened, packages of crackers should be rewrapped tightly and stored in a cool, dry place.
To make graham cracker crumbs:
Break graham crackers into pieces and grind in a food processor fitted with the metal blade. Or, place whole crackers in a large, heavy-duty plastic bag, press out the air, seal the bag, and crush with rolling pin.