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Crispy Air Fryer Brussels Sprouts from Costco

Costco's bag of Brussels sprouts becomes the crispiest, most caramelized vegetable side dish in 15 minutes in the air fryer — convert every Brussels sprout skeptic at your table with this one recipe.

Prep Time
5 min
Cook Time
15 min
Servings
4
Cost / Serving
$1.50

Quick Answer

Halve Costco's Kirkland Brussels sprouts, toss with olive oil and salt, and air fry at 400°F for 12–15 minutes, shaking the basket halfway through. The sprouts come out blackened and caramelized in about 20 minutes total — far crispier than the oven and faster than steaming. Serves 4 as a side.

Brussels sprouts in the air fryer are a revelation for people who think they don't like them. The intense, dry heat caramelizes the cut edges and crisps the outer leaves into something close to a chip, while the interior stays tender. Costco sells Brussels sprouts in a large bag that's perfect for this — halve them, season them, and let the air fryer do what it does best.

Instructions

  1. 1

    Trim the stem end off each Brussels sprout and halve them. Remove any loose or yellowed outer leaves.

  2. 2

    In a large bowl, toss sprouts with olive oil, garlic, salt, pepper, and red pepper flakes until evenly coated.

  3. 3

    Preheat air fryer to 375°F. Arrange sprouts cut-side down in a single layer. Do not overcrowd — work in batches if needed.

  4. 4

    Air fry for 12–15 minutes, shaking the basket halfway through, until the cut sides are deeply caramelized and the outer leaves are crispy.

  5. 5

    Transfer to a serving dish. Drizzle with balsamic glaze and top with shaved Parmesan if using. Finish with a squeeze of lemon.

Frequently Asked Questions

Why do air fryer Brussels sprouts taste better than roasted ones?+
The air fryer achieves higher surface temperatures with less moisture than an oven, which accelerates caramelization on the cut surface and turns the outer leaves crispy rather than just roasted. The turnaround time is also half that of oven roasting.
Should I cut Brussels sprouts in half or leave them whole?+
Always halve them for the air fryer. The flat cut surface is where all the caramelization happens — whole sprouts steam from the inside out and don't develop the same crispy exterior.
What can I serve these Brussels sprouts with?+
They pair well with almost anything — steak, chicken, salmon, or pork. They're also excellent tossed with cooked pasta, crumbled bacon, and a squeeze of lemon as a light main course.

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