There are so many different oils on the shelf, it's hard to choose which ones you need. Apart from your swanky extra-virgin olive oil, we would recommend sunflower oil or peanut oil for general frying and sautéing. Nut oils, such as walnut, which are wonderful in salads, go rancid quickly, so buy in small quantities. Rapeseed oil is very on-trend, but it does have a slight vegetal taste, so it's better for cooking rather than salads, unless you can find a cold-pressed oil.

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