- Kellogg's Frosties cereal bars are great for a tasty on-the-go snack. - Kellogg's Frosties breakfast cereal bars are a source of calcium & vitamin D. - Kellogg's Frosties breakfast cereal bars are made from yummy grains. - Kellogg's Frosties cereal breakfast bars contain no artificial colours or preservatives. - Kellogg's Frosties cereal breakfast bars are a source of fibre.