Top 10 Greatest br Breakfast Cereals of All Time In honor of br National Cereal Day, here are the top 10 cereals br as voted by cereal lovers at br mrbreakfast.com. 10. Puffa Puffa Rice Cereal, br Kellogg's 9. Cinnamon Toast Crunch Cereal, br General Mills 8. Krumble's Cereal, br General Mills 7. Honey Nut Cheerios Cereal, br General Mills 6. Cap'n Crunch Cereal, br General Mills 5. Concentrate Cereal, br Kellogg's 4. Cheerio's Cereal, br General Mills 3. Corn Flakes Cereal, br Kellogg's 2. Frosted Flakes Cereal, br Kellogg's 1.