- Kellogg’s Crunchy Nut breakfast cereal. The trouble is they taste too good! - Kellogg’s Crunchy Nut breakfast cereal is a source of vitamin D▪ - Start the day with the taste of Kellogg’s Crunchy Nut breakfast cereal. - Kellogg’s Crunchy Nut breakfast cereal contains no artificial colours or flavours. - Try our range of Crunchy Nut cereals, granola, and snack bars – The trouble is they all taste too good!