There's several things which affect how the frozen fish fillet cook. They all vary in size, thickness, type and heaviness of the breading so you’ll have to adjust timing. For best and even cooking, don't overcrowd the basket. Fill just an even single layer of fish fillets. All air fryers are different and some cook much hotter than others. Once you cook your first batch, you’ll know more of what works for your model of air fryer and size of food. These were tested on basket style air fryers. Read more recipe notes below the recipe. Nutrition will vary from brand to brand and will depend on the type of coating.