Pour the oil into a saucepan to a depth of 5cm and heat to 170C. (If you don’t have a temperature probe, see step 2.) Meanwhile, mix the batter ingredients with 200ml ice-cold water and 1/4 tsp salt in a large bowl until fully combined.

Check the oil is ready. If you don’t have a temperature probe, drop in a little batter – it should sizzle immediately. Dip a piece of banana into the batter. Gently lower into the oil and fry until crisp and golden brown, about 3 mins. Repeat with all the banana pieces and batter, regulating the oil temperature so that it doesn’t get too hot. Put the cooked fritters on a baking tray in a low oven to keep warm, then drain on a cooling rack over a baking tray lined with kitchen paper.