Exporting breakfast cereal to USA

[David_Hayward (RIP)]

Do any of you guys know if it is legal to export/import breakfast cereals in to the US of A please? An online friend of our daughter's wanst us to mail him a box or two of chocolate Ready-Brek, which is in fact a quick oat porridge breakfast cereal rather than wheat cereal. A pal imports FROM the States Kelloggs cerals that we have never seen...selling at huge prices. However I have no idea if there is a restriction the other way round to protect against weevils, etc.