Coco Pebbles is a gluten free sweetened crispy rice cereal for anyone who wants to start their day with chocolate. Coco Pebbles gluten free breakfast has been a family favorite for over 40 years! The best cereal for kids and grow-ups alike. Post Consumer Brands make more of the top 50 cereal brands than any other company. There is a lot of tradition here, but also so much delicious invention.