The world of cooking oils is confusing. I keep spotting new ones on supermarket shelves, trumpeting their health claims. Cold-pressed avocado oil, extra virgin macadamia oil, organic coconut oil, premium hemp seed oil … Even familiar oils are mired in controversy. Is it OK to cook with olive oil? Should you avoid seed oils? Meanwhile, prices keep rising – earlier this month, Walter Zanre, the CEO of Filippo Berio UK, said supermarkets were “taking the mickey” out of customers over olive oil pricing. I asked the experts which oils are really worth splashing out on.