Prep the air fryer: Preheat your air fryer to 350°F (175°C) for 3–5 minutes.
Lightly spray a 6–8 inch oven-safe dish or small casserole that fits in your air fryer basket.
Drain the spinach: Squeeze the thawed spinach dry using a clean kitchen towel or paper towels. Remove as much water as possible to avoid a watery dip.
Mix the base: In a bowl, combine cream cheese, sour cream, and mayonnaise. Stir until smooth and creamy. A handheld mixer makes this quicker.
Add flavor: Fold in the spinach, chopped artichokes, garlic, mozzarella, Parmesan, lemon juice, and red pepper flakes.
Season with salt and black pepper. Taste and adjust acid and heat.
Transfer and top: Spoon the mixture into the prepared dish. Smooth the top and sprinkle a little extra mozzarella and Parmesan for a golden crust.
Air fry: Cook at 350°F (175°C) for 10–14 minutes.
Check at 8 minutes. The dip is ready when it’s hot and bubbling at the edges and the top is lightly browned.
Optional finish: For deeper color, air fry 1–2 additional minutes. Watch closely to avoid over-browning.
Rest and serve: Let it sit 3–5 minutes to set slightly.
Serve warm with your favorite dippers.