How Long to Cook Roasted Sweet Potato Cubes (1-inch) in the sheet pan
Specification: 2 lb sweet potatoes peeled and cut into uniform 1-inch cubes, tossed with 2 tbsp olive oil, 1 tsp kosher salt, and a pinch of black pepper, spread in a single spaced layer on an unlined rimmed half-sheet pan (parchment traps steam and blocks browning here)
3-Step Execution Protocol
Preheat oven to 425°F (218°C). Arrange roasted sweet potato cubes (1-inch) (2 lb sweet potatoes peeled and cut into uniform 1-inch cubes, tossed with 2 tbsp olive oil, 1 tsp kosher salt, and a pinch of black pepper, spread in a single spaced layer on an unlined rimmed half-sheet pan (parchment traps steam and blocks browning here)) on a parchment-lined sheet pan in a single layer.
Cook for 25–30 mins. Flip at the 18-minute mark for even browning.
Cut faces that were touching the pan are deep mahogany with a caramelized crust; a paring knife slides through the thickest cube with no resistance; the corners have gone almost-black on a few pieces — that is the sugar caramelizing, not burning. Rest for 0 minutes before serving.
USDA MyPlate does not set an internal-temperature target for roasted starchy vegetables — doneness is judged by fork-tender interior and caramelized cut-face, so the internal-temp field is omitted rather than guessed (HR-2). The 425°F / 25–30 minute window reflects standard high-heat convection roasting for 1-inch peeled sweet-potato cubes on a rimmed half-sheet pan (Cook's Illustrated "Best Roasted Sweet Potatoes" and Serious Eats "Extra-Crispy Roasted Sweet Potatoes" both land in this window for the same cut and pan).