Yes, you can. You might not get the same perfect golden look of deep frying, but the texture and flavours will be the same. Spray the croquetas with vegetable oil. Pre-heat the air fryer at maximum temperature for 3 min. before introducing a small number of pieces on the basket. Settings will vary depending on brand and model of your air-fryer and its power and size. You might have to find out the right time and temperature for your machine. As a reference, we cook them at 200 C for approx. 13 min plus another 4 min at 180 C. Gently turn around the croquetas from time to time until golden.