I was really surprised how expensive basic food is in New York compared to UK[0]. Things like fruit, veg, cheese, cereal were more than twice the price. The only things that were cheaper were hotdogs and hotdogs buns. Eating out is very expensive in scandinavia but I don’t think supermarket food is expensive compared to the US.
[0] Prices at the large supermarkets don’t vary much if at all between shops across the UK