Drain and dry the beans

• Drain and rinse the black beans in a colander.
• Spread them out and pat them dry so they crisp up in the air fryer.

Season the beans

• Transfer the beans to a bowl and drizzle with olive oil.
• Season with salt, black pepper and Tajín, then toss to coat evenly.

Air fry until crunchy

• Place the beans in the air fryer basket in a single layer.
• Air fry at 200 °C, shaking the basket halfway through, until crunchy.

Serve

• Let the beans cool slightly so they get even crunchier, then serve.