You might have difficulty sending food from the US anyway if it is deemed perishable - see below from An Post's Addresspal Terms and Conditions
An Post does not carry:
Dangerous, poisonous or infectious items, explosives, munitions of war, firearms, corrosives, acids, paint removers, oxidising substances, organic peroxides, compressed, liquidised or dissolved gases (including butane gas lighters or aerosols), flammable solids or liquids or materials liable to spontaneous combustion, paints, varnishes, dyes, radioactive materials), pornography or anything that would cause embarrassment in transit, living creatures, prescribed or dangerous drugs , mercury, materials deemed illegal or prohibited by any Government Authority, Perishable Goods, organic or biological materials likely to perish under normal transit conditions, IATA restricted articles - such as liquids, Items likely to cause injury to any other Item or person, unless An Post has agreed in writing to carry such Items subject to such conditions as determined by An Post.