Book excerpt: Air fryers bake food at a high temperature with a high-powered fan, while deep fryers cook food in a vat of oil that has been heated up to a specific temperature. Both cook food quickly, but an air fryer requires practically zero preheat time while a deep fryer can take upwards of 10 minutes. Air fryers also require little to no oil and deep fryers require a lot that absorb into the food. Food comes out crispy and juicy in both appliances, but don't taste the same, usually because deep fried foods are coated in batter that cook differently in an air fryer vs a deep fryer. Battered foods needs to be sprayed with oil before cooking in an air fryer to help them color and get crispy, while the hot oil soaks into the batter in a deep fryer. Flour-based batters and wet batters don't cook well in an air fryer, but they come out very well in a deep fryer....