Why are my roasted vegetables soggy instead of crispy?
Put the empty sheet pan in the oven while it preheats to 425°F (220°C), then spread the oiled vegetables straight onto the hot metal. Contact heat sears the underside at once instead of letting them steam on a cold pan, so they come out golden and crisp in about 25 minutes.
How to do it
- Put the empty sheet pan in the oven before preheatingPlace a bare rimmed sheet pan on the middle rack before you turn the oven on, so the metal heats up along with the oven.
- Preheat to 425°F (220°C) and give the pan a few extra minutesOnce the oven reaches temperature, wait about 5 more minutes so the pan is hot all the way through.
- Toss the vegetables with oil and salt in a bowlCut them into even pieces, pat them dry if they were washed, and coat them lightly in a bowl rather than on the pan.
- Spread them on the hot pan in a single layerPull the pan out with oven mitts and spread the vegetables cut side down, with space between pieces. You should hear a sizzle.
- Roast about 25 minutes, flipping onceTurn the pieces halfway through, once the undersides are golden and come away easily from the metal.
Questions that come up
Is it safe to heat an empty sheet pan in the oven?
Standard aluminum or steel sheet pans handle it fine at roasting temperatures. Thin pans can warp or pop for a moment as they heat, but the damage is only cosmetic. Don't do this with glass or ceramic dishes: if you drop cool, wet food onto them while they're scorching hot, thermal shock can crack them.
Can I still use parchment paper or a silicone mat?
You can, but you'll lose some of the browning. Parchment sits between the food and the hot metal and softens the contact sear, and silicone softens it even more. For the deepest crust, oil the vegetables and put them straight on the bare pan. Check your parchment's temperature rating, which is often around 420-450°F.
Why are my vegetables still soggy on a hot pan?
Usually it's crowding. When pieces touch, they trap moisture and steam each other, even on a preheated pan. Use two pans if one is full, dry washed vegetables well, and don't drown them in oil. Very watery vegetables like zucchini will brown less than potatoes or carrots no matter what.
Full transcript
Pale, steamed vegetables? Preheat the empty sheet pan first. Slide the bare pan into the oven while it heats up. Then spread your oiled vegetables onto the hot metal. They sizzle on contact. Same oven, same twenty-five minutes. Cold pan: paler, softer. Hot pan: a deep golden crust.