Press the tofu (optional step). Wrap the block of tofu in a kitchen towel or paper towels. Place a heavy cast iron skillet on top and let it sit for 30 minutes.

Preheat the air fryer to 400°F.

In a large bowl, combine the oil, tamari, and sriracha. Cut the tofu into cubes, add it to the bowl, and gently toss to coat.

Sprinkle the cornstarch over the tofu and toss again to ensure even coating.

Place the tofu cubes into the air fryer basket in a single layer with a little space between each piece. Don’t overcrowd the basket.

Air fry for 11 to 15 minutes, flipping halfway, or until golden brown and crisp around the edges. Repeat with any remaining tofu.