Marshmallows: For crunchy, sugary marshmallows, use the Jet Puffed Mallow Bits instead of mini marshmallows to top these No Bake S’mores Cookies. Add-Ins: You can mix-in up to 1 cup of additional ingredients like M&Ms, peanuts, walnuts, toffee bits, peanut butter cups, dried berries, or cookie pieces.