Short Answer:

The ideal temperature for cooking Brussels sprouts in an air fryer is 180–200°C (350–400°F). This range ensures that the outer leaves become golden and slightly crispy while the inside stays tender.

Cooking time typically ranges from 12–15 minutes, depending on the size of the sprouts and your desired level of crispiness. Shaking or tossing the basket halfway through promotes even browning and prevents burning.

Detailed Explanation:

Temperature and Time for Brussels Sprouts

Cooking Brussels sprouts at the right temperature and time is crucial for achieving a crispy exterior and tender interior. Setting the air fryer to 180–200°C (350–400°F) allows the hot air to circulate evenly around the sprouts. This temperature is hot enough to caramelize the natural sugars in the outer leaves, enhancing flavor, without burning the tender core of the sprouts. Lower temperatures may cook them unevenly and leave them soft, while higher temperatures can burn the edges before the inside is fully cooked.

Optimal Cooking Time
Brussels sprouts usually require 12–15 minutes in the air fryer. The exact time depends on the size of the sprouts: smaller, halved sprouts may be done closer to 12 minutes, while larger pieces may need the full 15 minutes. Checking the sprouts during the last few minutes ensures they reach the desired level of crispiness without overcooking. Proper timing preserves nutrients and flavor while giving the sprouts a golden-brown exterior.

Even Cooking Techniques
To ensure even cooking, arrange the sprouts in a single layer in the air fryer basket. Overcrowding can prevent proper hot air circulation and result in uneven browning or soggy pieces. Shaking or tossing the basket halfway through the cooking process helps expose all sides to heat, creating uniform crispiness and golden edges. Preheating the air fryer for a few minutes can also improve cooking consistency.

Texture and Flavor
At 180–200°C for 12–15 minutes, Brussels sprouts develop a tender interior and a slightly crisp exterior. The hot air removes excess moisture, allowing the outer leaves to caramelize while keeping the inner layers soft. This balance of textures makes the sprouts more flavorful and appealing, enhancing both taste and presentation.

Tips for Best Results
Lightly coat the sprouts with oil to help achieve a crisp surface. Season with salt, pepper, garlic powder, or herbs before cooking. Avoid adding wet marinades before air frying, as they can create steam and prevent crisping. You can also add additional seasonings or sauces after cooking to maintain texture and enhance flavor.

Conclusion

The ideal temperature for air frying Brussels sprouts is 180–200°C (350–400°F), with a cooking time of 12–15 minutes. Proper spacing, preheating, and shaking the basket halfway ensure even cooking and a balance of crispy outer leaves with tender interiors. Following these guidelines produces flavorful, golden, and healthy Brussels sprouts that are perfect as a side dish or snack.