For all those who love treats and are excited to enjoy these Chocolate Peanut Butter Crunch Cups here's a little tip to make this recipe completely gluten-free! The secret is to be careful when selecting your ingredients, the rice crisp cereal. Some cereal brands may have hidden gluten. Could be manufactured in facilities that also handle gluten containing products. To ensure that your crunch cups are truly gluten-free choose a rice cereal that is certified as gluten-free.