For flourless peanut butter cookies, combine 1 cup granulated sugar with 1 egg and 1 cup peanut butter. Drop by teaspoonfuls on cookie sheet. Bake 8 min at 350 degrees.
Most monster cookie recipes are flourless but they do contain oatmeal which sometimes can contain traces of gluten. Your best bet is to use a gluten free mix (available in many health food stores) that substitutes non-gluten flours for the wheat flour.