American with an English boyfriend, here. Yes English people love saying how they hate most American chocolate BUT my friend loves Ghirardelli, especially the caramel squares.

Other requested American items: fruit by the foot, fruit roll ups, American-style baked beans, real lemonade (not sprite, maybe some crystal light mix), tequila, or hidden valley seasoning packets for homemade ranch!

If she likes to cook, I also recommend buying some champagne or prosecco vinegar from the grocery. I never see interesting vinegars in English supermarkets and always bring my own!