To make this Cherry Mash Bar Recipe gluten free, verify that the marshmallows, cherry chips or white almond bark, cherry extract, vanilla extract, semi-sweet chocolate chips, peanut butter, evaporated milk, margarine, and salted peanuts are labeled gluten free. Use clean cookware, utensils, and a baking dish to prevent cross-contact with gluten-containing ingredients. If packaging the bars for gifting, use gluten-free-safe parchment, wrappers, or containers.