How long to cook Brussels Sprouts at 325°F
| Start checking atthe low end — an oven running hot gets here first | 35min |
|---|---|
| Expected timefor 1 lb, halved at 325°F | 40min |
| Pull temperatureno meaningful carryover at this size | 200°F |
| Same dish at 400°F1.6× longer at 325°F | 25min |
| Resting timeserve straight away | 0min |
Notes
- Brussels Sprouts. Cut side down on the tray, in one layer, with space. The browning is the point, and it only happens where the surface touches hot metal — piled sprouts steam and taste of sulphur.
- Time here comes from the temperature difference the oven is working against, not from a minutes-per-pound rule: t = t₄₀₀ × (400 − 200) ÷ (T − 200). Because the target for this vegetable is 200°F, dropping the oven from 400 to 350 multiplies the time by 1.33. A dish with a lower target changes far less — which is why one blanket "add ten minutes" rule cannot work.
- Carryover is negligible at this size, so the pull temperature and the serving temperature are effectively the same.
- Thickness governs time far more than weight does — heat travels inward from every surface, so the centre of a piece twice as thick takes roughly four times as long. Two items of identical weight and different shape are not the same job.
- Domestic ovens commonly run 15 to 25°F away from the dial and cycle around it rather than holding steady. An oven thermometer settles this once and changes every timing you will ever use; until then, treat the low end of the range above as the moment to start checking rather than the moment it is done.
The short answer
Brussels Sprouts at 325°F takes about 35–45 minutes for 1 lb, halved.
Pull it at 200°F internal. There is no meaningful carryover at this size, so serve it straight away.
Why the clock is the wrong tool on its own
That range is fifteen minutes wide at the edges, and the gap between juicy and dry on most of these is smaller than that. The time tells you when to start checking; the probe tells you when it is done.
Three things no timing chart can hold: whether the food went in from the fridge or the counter, how far your oven's real temperature sits from the dial, and how thick this particular piece is. Domestic ovens commonly run 15 to 25°F off, and they cycle around the setpoint rather than holding it.
How the temperature changes the time
The time comes from the temperature difference the oven is working against, not from a minutes-per-pound rule:
t = t₄₀₀ × (400 − 200) ÷ (T − 200)
At 400°F this is 25 minutes. At 325°F it is 40 — 1.6× that.
Because the target here is 200°F, dropping the oven changes the time more than it would for a dish with a lower target. A rare beef roast pulled at 125°F barely notices a fifty-degree drop; anything pulled at 180°F notices it a great deal. That is why one blanket "add ten minutes" rule cannot work across a whole oven's worth of food.
Thickness, not weight
Heat travels inward from every surface, so time scales with roughly the square of the thickness. A piece twice as thick takes about four times as long, at the same weight per portion.
This is why a tenderloin and a loin roast of similar weight are not remotely the same job, and why minutes-per-pound tables work for one shape and mislead for every other.
What this dish in particular does
Cut side down on the tray, in one layer, with space. The browning is the point, and it only happens where the surface touches hot metal — piled sprouts steam and taste of sulphur.
Getting the probe reading right
Into the thickest part, away from bone and away from fat — bone conducts heat faster and reads high, fat reads low. In a thin cut, go in from the side rather than down from the top, or the tip sits closer to the pan than to the centre.
Check the coldest piece on the tray, not the nearest one.
Nearby sizes
Read more
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