Preheat air fryer to 300°F (150°C) for about 2 minutes.
Remove Costco Mini Quiches from packaging. No need to thaw—they should be cooked straight from frozen.
Place up to 16 mini quiches in a single layer in the air fryer basket, leaving space between each one.
Optional: Lightly spray the tops with cooking spray for an extra golden, crisp crust.
Cook for 10–14 minutes, checking after 10 minutes. Quiches should be golden brown and reach an internal temperature of 165°F.
Carefully remove from the air fryer and let them cool for 1–2 minutes.
Garnish with chopped fresh parsley if desired. Serve hot with fruit, salad, or as part of a frozen breakfast spread.