Prep the broccoli. Rinse and dry thoroughly. Cut into small, bite-size florets with flat sides when possible. Thin, small pieces crisp best.
Dry it well. Pat the florets with a clean towel. Moisture is the enemy of crispiness, so take a minute to really dry them.
Season. In a large bowl, toss broccoli with oil, salt, pepper, and any optional spices.
If using Parmesan, save it for the last two minutes of cooking.
Preheat the air fryer to 375°F (190°C). A warm basket helps the florets crisp faster and prevents sticking.
Arrange in a single layer. Lightly spray the basket if needed. Spread the florets out so they aren’t piled up. Work in batches if necessary.
Air fry for 6–8 minutes. Shake the basket halfway through.
Look for browned, crispy edges with tender centers. Adjust time by 1–2 minutes based on size and your air fryer model.
Add Parmesan (if using). Sprinkle it over the broccoli during the last 1–2 minutes so it melts and clings without burning.
Finish and serve. Taste and adjust salt. Squeeze a little lemon over the top for brightness.
Serve hot for peak crunch.