On my annual trip to the states I take the following to my son who lives in COS, CO:
Cherry Ripes (confectionary)
Violet Crumbles (confectionary)
Vegemite (spread)
Red Skins (confectionary)
My ex-boss in PIT who lived in Australia for a while always gets me to bring:
Tim Tams (biscuits ie cookies) - Arnotts brand and definitely not generic
Chicken flavoured potato chips (crisps)
Red Skins (confectionary)
Nyal cold and Flu tablets - available in supermarkets in Australia - I think they are herbal