Preheat your oven to 425°F (220°C). For the crispiest results, place an empty rimmed baking sheet in the oven as it preheats. A preheated baking sheet means the cauliflower makes contact with a hot surface immediately, which sears the bottom of each piece and jumpstarts browning rather than allowing the florets to sit in their own moisture as the pan gradually heats. If you prefer easier cleanup, line a cold baking sheet with parchment paper — you will lose a small amount of crispiness on the bottom but the results are still excellent.
Step 2: Season the Cauliflower
Place the dried cauliflower florets in a large bowl. Drizzle the olive oil over them and toss to coat each piece thoroughly — use your hands for the most even coating. Add the garlic powder, paprika, salt, pepper, and any additional seasonings, and toss again until every floret is evenly coated in the spiced oil. Taste a raw piece and adjust seasoning if needed — this is your only opportunity to season before roasting.
Step 3: Arrange and Roast
If using a preheated baking sheet, carefully remove it from the oven and arrange the cauliflower pieces flat side down in a single layer, leaving clear space between each piece. The flat cut surface should be in contact with the hot pan. If using an unheated sheet with parchment, arrange the cauliflower directly on it. Either way, do not crowd the pan. Roast at 425°F for 25 to 30 minutes total, flipping each piece once at the halfway point — around the 13 to 15 minute mark. Flipping ensures both sides develop golden color rather than just the bottom. The cauliflower is ready when the edges are deeply golden, some spots are approaching a light char, and the florets are tender when pierced with a fork but still hold their shape.
