Here's a handy conversion guide for graham crackers and some cookies: - 10 graham cracker sheets will yield 1¾ cups - 40 chocolate cookies (255 grams) will yield 2 cups - 71 vanilla wafer crackers (250 grams) will yield 2 cups of crumbs - 43 gingersnaps (304 grams) will yield 2 cups of crumbs.