1. Preheat an air fryer to 375 degrees Fahrenheit. In the meantime, while the air fryer heats up, trim 1 pound of Brussels sprouts and cut those that are more than an inch broad in half. Toss in 1 tablespoon of olive oil and ½ teaspoon of kosher salt in a medium-sized mixing dish to blend.
2. Shake the Brussels sprouts into a single layer in the air fryer. Let them cook for 15 minutes in total, stopping halfway through to shake the basket (or rotate the pans if using a larger air fryer). You can also prepare the shallot butter in the meantime.
3. Get one medium shallot finely chopped. In a medium microwave-safe bowl, heat two tablespoons of unsalted butter until they melt. (As an alternative, you can also melt over low heat in a medium saucepan, then remove from the flame.) Stir in the shallots and one teaspoon of red wine vinegar until everything is well combined.
4. As soon as the Brussels sprouts are done, stir them with the shallot butter in a mixing basin or saucepan and serve the sprouts right away.

This recipe results in flavorful Brussel sprouts, and no one would blame you if you never want to cook these veggies any other way. The entire cooking duration lasts 15 minutes, including a prep time of 15 minutes.

If you’d like to see more ways to use an air fryer for cooking Brussel sprouts, then this video recipe might interest you.