Short Answer:

Yes, you can roast frozen vegetables in an air fryer. The hot air circulation cooks them quickly and evenly, producing a tender interior with a slightly crispy exterior.

No thawing is required, and you can add a small amount of oil or seasoning to enhance flavor. Air frying frozen vegetables is convenient, preserves nutrients, and gives a fresh, roasted taste without the need for a conventional oven.

Detailed Explanation:

Roasting Frozen Vegetables

Direct Cooking from Frozen
Air fryers allow you to cook frozen vegetables directly without thawing. The circulating hot air heats the vegetables evenly, preventing them from becoming soggy. Unlike boiling or microwaving, air frying maintains texture and enhances flavor by roasting the surface.

Temperature and Time
The ideal temperature for roasting frozen vegetables is 180–200°C (360–400°F). Cooking time varies by type and size of the vegetable, usually 10–20 minutes. Smaller pieces like broccoli florets or sliced carrots may cook faster, while thicker vegetables like cauliflower or potato chunks may require additional minutes. Adjust cooking time as needed for uniform tenderness.

Light Oil and Seasoning
Tossing frozen vegetables with a small amount of oil before air frying can enhance browning and crispiness. Adding salt, pepper, herbs, or spices before cooking improves flavor. Minimal oil is sufficient because the air fryer circulates hot air efficiently to produce a roasted effect.

Shaking or Tossing Midway
Shaking or stirring the vegetables halfway through cooking ensures even exposure to hot air. This prevents uneven browning or soft spots and helps all pieces develop a slightly crispy exterior while remaining tender inside.

Preserving Nutrients and Flavor
Air frying frozen vegetables preserves more nutrients compared to boiling or steaming because they cook quickly with less water. The roasting effect also enhances natural flavors, making them taste fresher and more appealing.

Serving Tips
Serve immediately after air frying for the best texture. Roasted frozen vegetables can be used as side dishes, salad toppings, or added to stir-fries and grain bowls. Leftovers can be reheated in the air fryer for a few minutes to restore crispiness without losing flavor.

Conclusion:

You can roast frozen vegetables directly in an air fryer, producing tender, flavorful, and slightly crispy results. Using 180–200°C, adding a small amount of oil and seasoning, and shaking halfway ensures even roasting. This method is fast, convenient, nutrient-preserving, and gives frozen vegetables a fresh, roasted taste without the need for traditional oven cooking.