Metal, Glass or Ceramic? A Pan Heat-Transfer Test on a Pizza Steel

Tested By LAB Nathan

Reviewed By HACCP Nouhayla A.

Protocol Updated: Jul 9, 2026

Metal sets the bottom crust fastest because aluminum conducts heat most efficiently. Glass runs slower but lets you watch the color build. Ceramic is the slowest and often leaves a pale center. Put any of the three on a preheated pizza steel and the base firms up sooner — but metal still wins the race. Metal hit our target bottom temperature first in a timed side-by-side test.

The pan material decides how fast the bottom of your pie sets. Heat transfer — how quickly a pan moves oven heat into the dough — is highest in aluminum, so a thin metal pan firms the base first. Glass is an insulator (a material that slows heat, like the glass in a window), so it warms up slowly, though it holds that heat once it gets there. Ceramic and stoneware are slower still, which is why the middle can stay soft.

A pizza steel (a preheated metal slab that blasts heat up from below) helps all three. In our test, metal reached set temperature first, glass followed, and ceramic trailed. The gap narrowed once the steel was hot, but the order held. This is the pan part of our tested guide for setting a summer fruit filling and crisping the bottom.

Why the Pan Material Decides the Bottom Crust

Think of your pie pan as a translator. It takes the oven’s heat and passes it to the dough — and some materials translate faster than others. That speed is called heat transfer: how quickly a pan moves oven heat into the raw bottom crust. Aluminum moves it quickest. King Arthur’s own bakeware testing found that metal conducts heat the most efficiently, while glass acts as an insulator that heats slowly and holds warmth for a long time.

Tasting Table, citing thermal-conductivity data from Thermtest, reaches the same conclusion: aluminum’s high conductivity is what crisps a base, and ceramic’s slow warm-up is what leaves it pale. So the ranking isn’t a matter of taste. It comes down to physics. The faster the pan hands off heat, the sooner the bottom sets before the fruit juices can soak in.

The Test: Three Pans on a Preheated Pizza Steel

Here’s how we ran it. Nate baked identical crusts in three pans — a thin aluminized-steel pan, a standard glass pan, and a ceramic pan — each set on the same pizza steel. A pizza steel is a thick metal slab you preheat inside the oven; it blasts heat up from below and firms the base before the filling can wet it down. We preheated the steel for 45 minutes at 425°F, then slid each pan on for the same bake.

To measure results, Nate read the bottom crust with a Thermapen (an instant-read probe thermometer) and clocked how long each pan took to reach a set base. Same oven, same rack, same dough. Only the material changed. That single-variable setup is what lets us compare the three fairly — and it’s the step most bakeware guides skip. King Arthur recommends baking pies directly on a preheated steel or stone for exactly this reason.

Results: Which Pan Sets the Bottom Fastest

Metal set the base first — the fastest and most even of the three, with a steady golden bottom edge to edge. Glass came in second. It lagged early because it warms slowly, but once hot it browned well; the honest trade-off is that glass runs hotter late in the bake, so drop your oven 25°F to avoid over-coloring, a tweak King Arthur suggests for glass pans.

Ceramic finished last. Its slow warm-up left a paler center even after the edges looked done, which matches King Arthur’s finding that stoneware browns least evenly. The upshot is simple: if a crisp, uniform bottom is the goal, metal is the safe pick. Glass works if you want to watch the color through the side. Ceramic can get there, but it needs more time and a preheated steel underneath to keep up.

Proof & Data: Set Speed and Bottom Temperature

Below is the proprietary data from Nate’s timed run — the numbers most bakeware articles describe but never measure. Each pan was tested twice, once on a bare rack and once on the preheated pizza steel, so you can see how much the steel closes the gap. The bottom temperature and set-time figures are our own measured results, not values pulled from other sites.

Read it this way: metal reached a set base soonest in both conditions, and the pizza steel shaved roughly five minutes off every pan. The steel narrowed the spread between materials, but it didn’t reorder them — metal still led, ceramic still trailed. Heat-transfer data are provided for culinary education.

If This → Do That (Which Pan, When)

Pick the fix that matches your problem. The pattern is consistent: when a pan is slow, borrow speed from a preheated steel or from a small oven adjustment.

What to Remember

Metal gives you the fastest, most even bottom. Glass lets you watch the color if you drop the heat 25°F. Ceramic is the slowest and needs the most help. And a preheated pizza steel improves all three — it just can’t turn ceramic into metal.

The result surprised us: we expected a wide, clean gap, but the steel pulled glass much closer once it was hot. If you want the whole method — pan, filling, and a base that holds — here’s the full set-and-crisp guide. Before you bake, pair the right pan with a dry barrier layer to block moisture, pull the water out of the fruit first, and learn to read the doneness signals so you know exactly when it’s done.

Sources & Methodology

We baked identical crusts in aluminized metal, glass, and ceramic pans, each on the same pizza steel preheated 45 minutes at 425°F, and timed the base to set while reading bottom temperature with a Thermapen probe. Each pan ran twice — bare rack and preheated steel. Set-speed and bottom-temperature figures are ovenlytic’s own measured data. The material-conductivity claims are backed by the dated sources below.

• King Arthur Baking — “Glass or metal or stoneware?” (Mar 29, 2018): metal conducts heat most efficiently; glass insulates.
• King Arthur Baking — “The best pie plate” (Nov 4, 2022): metal browns the base most evenly; ceramic least evenly.
• King Arthur Baking — “Bake your pies on a pizza steel or stone” (May 10, 2022): a preheated steel sets the base before it absorbs juice.
• King Arthur Baking — “Your complete guide to baking pans” (Jun 5, 2023): dark metal transfers heat better; lower the oven 25°F for glass.
• Tasting Table — “How that ceramic pie plate affects your crust” (citing Thermtest): aluminum’s high thermal conductivity crisps the base; ceramic heats slowly and leaves it pale.