Prep the basket: Line your air fryer basket with a perforated parchment liner. Preheat to 350°F (175°C) if your model recommends it.
Warm your protein: If using meat or beans, make sure they’re fully cooked and warm. Cold toppings can slow melting and make chips soggy.
Build the first layer: Add a single, slightly overlapping layer of chips. Sprinkle a generous handful of cheese, then add half your protein and a few jalapeño slices or onions.
Repeat with a second layer: Another layer of chips, more cheese, and the rest of your protein. Keep fresh, watery toppings off for now.
Air fry: Cook at 350°F (175°C) for 3–5 minutes. Check at the 3-minute mark. You want fully melted cheese and toasty edges but not burnt chips.
Add fresh toppings: Pull the basket and quickly top with diced tomatoes, cilantro, extra jalapeños, or red onion. Drizzle with a little hot sauce if you like.
Finish and serve: Slide nachos onto a platter. Add dollops of sour cream and guacamole. Serve immediately with salsa on the side.