Preheat the air fryer to 375°F
Wash and trim the green beans
Pat the green beans dry
Toss the green beans with olive oil, salt, and pepper
Add garlic powder or other seasonings if desired
Place the green beans in the air fryer basket in a single layer
Air fry for 8 to 10 minutes
Shake the basket halfway through cooking
Cook until the green beans are tender and lightly crisped
Serve immediately