Make Air Fryer Butternut Squash for crisp-edged, tender cubes—fast, flavorful, and ready in about 37 minutes.
Toss the peeled, 1‑inch diced butternut squash into a roomy matte ceramic bowl, give the cubes a quick visual check for uniformity, then transfer them into the air fryer basket. Lightly mist the squash with an olive oil spray (or drizzle a tablespoon of olive oil and toss so every cube gets a thin sheen). The goal is an even, barely‑oily film that will promote caramelization and crisp edges without sogginess.
Air fry at 340°F for about 20–23 minutes, shaking the basket a few times during cooking so the cubes brown evenly; watch for a tender interior and deeply golden, slightly caramelized faces. While the squash roasts, whisk the dry rub together in a small bowl: onion powder, garlic powder, sweet paprika, cayenne, kosher salt, and the optional brown sugar—this creates a fragrant, granular coating that will cling to warm squash. The visual milestone is the tray of uniformly golden, slightly blistered cubes with a small bowl of the finished spice mix at the ready.

When the squash is fork‑tender and golden, drizzle a little more olive oil over the cubes and gently toss to redistribute the surface oil. Sprinkle the spice mixture over the warm squash and toss again until each cube wears a thin, even speckled coating. Return the basket to the air fryer (or place the basket back on the surface) for 3–4 more minutes to set the spices and deepen any caramelization—this final short crisping seals the texture contrast between crunchy edges and a creamy interior.
Transfer the finished cubes to a serving vessel and serve immediately so the contrast between the crisp, browned exterior and the tender, buttery interior is at its peak. Present the squash piled naturally with glossy olive oil highlights and visible flecks of the spice blend for an inviting, rustic finish.
