Traditional smash burgers done on a flat, hot surface can quickly lose their moisture when flattened. Luckily, using an air fryer can eliminate this moisture loss.
With an air fryer, the "smash" of the patty occurs before the cooking process, retaining the meat's juices. Thanks to their thinness, an air fryer cooks the patties quickly.
For the juiciest burgers, use high-quality ground beef with a high fat content, preheat the air fryer, and don’t overcrowd the basket for even cooking.