Mmm, tasty oil! There are two ways to add delicious flavours to your oil; flavouring by infusion and flavouring by cooking. Infusion can take quite a while but, for delicately flavoured oil such as basil, it’s the only way. It’s also much better suited to drizzling as it has fresher flavours. Creating flavoured oil by cooking, on the other hand, can be done as an adjunct to normal cooking to provide a steady supply and allows a rich palette of vegetable flavours such as roasted onion oil or roasted aubergine oil.