Start by preheating your air fryer to 400°F (200°C). This helps in achieving an even cook and a nicely browned exterior.
In a bowl, toss the frozen butternut squash with olive oil, ensuring each piece is lightly coated.
Season with salt, pepper, and any additional seasonings you prefer. If using herbs, finely chop them and mix in.
Spread the seasoned butternut squash in a single layer in the air fryer basket. Avoid overcrowding to ensure even cooking and browning.
Cook the squash for about 15-20 minutes. It's a good idea to shake the basket or gently stir the squash halfway through the cooking time to promote even browning.
The squash is done when it's tender and the edges have a nice caramelization. Cooking time may vary slightly based on the air fryer model and the size of the squash pieces.
Once cooked, serve the butternut squash hot. It makes a great side dish for a variety of main courses and is especially delicious in the fall and winter months.