Air Fryer Brussels Sprouts: Time & Temperature

Brussels sprouts were made for the air fryer. Cut in half and tossed in a little oil, they turn deeply browned and crisp on the outside while staying tender in the middle, all in under 20 minutes and without heating up the oven. The rapid, circulating air does the same work as a hot roasting pan, only faster and with far less oil.

The keys are simple: halve the sprouts so each piece has a flat, cut side; toss them in just enough oil to coat; and shake the basket partway through so every side meets the heat. Starting the halves cut-side down helps that first face caramelize into the crispy, almost chip-like texture people love. Below you'll find times and temperatures for both fresh and frozen sprouts, plus tips to get them crisp every time.

How to use this chart

These times assume Brussels sprouts halved into roughly equal pieces and spread in a single layer. Air fryers vary widely by wattage, basket size, and how full they are, so treat the ranges as a starting point and check a minute or two early the first time. Smaller batches cook faster; a crowded basket steams instead of crisps and needs a few extra minutes plus an extra shake. Brussels sprouts are a vegetable, so there's no required safe internal temperature to hit the way there is for meat or fish; judge doneness by color and by how easily a fork pierces them.

Tips for the crispiest sprouts

• Preheat the air fryer 3–5 minutes so the sprouts start browning the moment they hit the basket.
• Use about 1 tablespoon of oil per pound—enough to coat, not so much that they turn greasy.
• Lay the halves cut-side down in a single layer; the flat face caramelizes best against the hot basket.
• Don't overcrowd. If they overlap, cook in two batches so the air can circulate.
• Shake or toss once or twice so every side crisps evenly.
• Add garlic, parmesan, or balsamic in the last few minutes or after cooking—they burn quickly at high heat.
• For frozen sprouts, skip thawing but pat off surface ice so excess water doesn't steam them soft.

Frequently asked questions

Do I need to preheat the air fryer?

It helps. A 3–5 minute preheat means the cut sides start searing immediately, which gives you a better crisp. If you skip it, add a couple minutes to the time.

What's the difference between fresh and frozen?

Frozen sprouts carry surface ice and extra moisture, so they need a little more time—about 14–18 minutes at 375°F—and often a second shake. Pat them dry and don't thaw first, which only makes them soggy.

Why aren't mine getting crispy?

Usually the basket is too crowded, there's too little oil, or the cut sides aren't facing down. Cook in a single layer, coat lightly with oil, and start them cut-side down. Bumping the heat to 400°F for the last few minutes also helps.

How do I know when they're done?

The outsides should be deep golden to lightly charred and a fork should slide easily into the center. Vegetables have no USDA safe internal temperature to hit—that guidance is for proteins (for reference, chicken is 165°F, ground meats 160°F, and fish 145°F). If you're air-frying meat or fish alongside them, use an instant-read thermometer to confirm.

Can I cook Brussels sprouts whole?

Small sprouts can be cooked whole at 375°F for about 15–18 minutes, but halving is better: the cut sides brown and crisp, and the insides cook through more evenly. Halve anything larger than a walnut.