Air Fryer Brussels Sprouts
Halved brussels sprouts crisp up at 375°F in about 12–15 minutes, cut-side down, shaken once around the halfway mark. Toss them in a light spray of oil first or they won't brown. That's the short version.
Here's the part the recipe posts skip. The reason a batch comes out half-charred and half-raw isn't the temperature. It's that the sprouts weren't the same size going in. Fix that and the rest of this is easy.
Converting an oven recipe instead? Run the numbers through the calculator.
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| Cut / Prep | Oven Temp | Air Fryer Temp | Oven Time | Air Fryer Time | Notes |
|---|---|---|---|---|---|
| Halved (medium, ~1") | 400°F | 375°F | 20–25 min | 12–15 min | Cut-side down. Shake at 7 min. |
| Small whole | 400°F | 375°F | 22–25 min | 14–16 min | Dense center, no flat face. Halve them anyway. |
| Large (over 1.5") | 400°F | 375°F | 25 min | 15–18 min | Quarter the giants so they match the rest. |
| Frozen (no thaw) | 425°F | 375°F | 25–30 min | 15–18 min | They steam first. Oil after 5 min, shake twice. |
These are sourced starting points for a basket-style unit — solid reference numbers, not something I've logged in my own kitchen yet. Sprouts vary too much by size to trust the clock. Go by colour: pull them when the outsides are deep brown and a knife slides into the center with no resistance.
Why one batch comes out half-burnt, half-raw
The advice you'll read everywhere is "halve the ones bigger than an inch, leave the small ones whole." That single instruction is what causes the mixed batch. You end up with small whole sprouts — dense, round, no flat side — sitting next to large halved ones with a flat face pressed to the hot basket. The flat faces blacken while the whole ones are still firm in the middle.
The fix isn't a lower temperature. It's making them match. Halve everything, quarter the ones that are still golf-ball big, and give even the little sprouts a cut face to sit on. One size in, one finish time out. Thickness moves the cook more than anything else on this list, which is exactly why a single-number chart gets brussels sprouts wrong so often.
Cut-side down, and the char-vs-burn line
The flat cut face is where the good browning happens, so lay the sprouts cut-side down for the first 7–8 minutes. Direct contact with the hot basket floor caramelises that face the way a pan would. Shake once after that and let the rounded backs colour on the second half.
Knowing when to pull them is the whole game. Deep brown and blistered at the edges is right, and a few dark, crisp outer leaves are the best bite in the basket. Papery black and ashy is past it — that's where the bitter taste comes from, not from the sprout itself. If the outsides are blackening before the centers give, the sprouts were too big or the basket ran too hot. Drop to 375°F and cut smaller rather than pulling them early and biting into a raw core.
Loose outer leaves are the first thing to burn. They're light enough to lift in the airflow, and they'll char to ash while the sprout itself is still firm — the same reason very light, leafy things don't belong in a basket. Pull off anything already falling away before they go in.
Three things that actually change the result
Same size in, same time out. Sort and cut so every piece is roughly equal. This is the one that separates an even, deep-brown batch from a mix of burnt and raw.
Dry them, then oil them. Water on the surface steams, and steam is why sprouts go soft instead of crisp. Pat them dry, then a light spray of oil — enough to coat, not a puddle.
Single layer, room between. The first thing I ever ruined in an air fryer was a basket crammed full of frozen fries. I figured more food, one cook. It came out pale and soft, and piling sprouts two deep does the same thing: the bottom steams while the top burns. Airflow is the entire point of the machine.
Basket-style vs oven-style
The times above were pulled for a basket-style unit. Oven-style air fryers have more room inside and move the air differently, so the same tray of sprouts usually needs roughly 2 to 5 minutes longer. Same target — deep brown outside, tender in the center — just give it the extra time and start checking where the basket number would have finished. Most recipe pages never split this, which is how one chart leaves you pale on one machine and scorched on another.
When the oven wins
A basket does about a pound of sprouts in a single layer, and single layer is the rule you can't cheat. Cooking them as a side for four or more people means two or three batches, and by the third the first one is cold. A sheet pan at 400°F does the whole lot in one go. For a crowd, the oven is the better tool here. The air fryer earns its place when you're doing one or two portions and want them crisp in fifteen minutes flat.