a clean counter, like a granite or other cool surface, where it can rest while you work.
In a medium mixing bowl, stir together the graham cracker crumbs and peanut butter until everything is evenly combined and the mixture looks like thick, slightly crumbly dough. It should hold together when pressed between your fingers; if it seems too dry and sandy, add another tablespoon or two of peanut butter and mix again.
Transfer the graham cracker–peanut butter mixture to the