The top and the bottom of a pizza cook by different routes. The base cooks mostly by contact with the hot steel, stone or oven floor. The cheese browns from heat radiating down from above: the broiler element, the oven roof, or the flame rolling across a pizza oven’s dome. Modernist Pizza showed how much the top depends on that radiant heat: when the authors shaded part of a Neapolitan pizza with a mirrored shield, the cheese underneath melted much less and didn’t brown at all.
So burnt cheese is a balance problem. Either the top is getting more heat than the base can keep up with, or the bake is longer than your cheese can take. The underside of the pizza tells you which.
Diagnose it in one look
| What you see | What it means | Change next time |
|---|---|---|
| Cheese burnt, base pale or soft | Top heat is outrunning bottom heat | Preheat the surface longer, lower the rack, shorten the broil, or lower a pizza oven’s flame after launch |
| Cheese burnt, base and rim well browned or dark | The whole bake ran long | Pull it sooner, or add the cheese partway through |
| Cheese brown in spots before it has fully melted, base fine | The cheese browns easily | A whiter, fresher mozzarella; hard cheese under the mozzarella, not on top |
| First pizza fine, later ones burn on top | The surface lost heat between pizzas | Let the steel or stone recover, and check it before each launch |
Why the top and bottom drift apart
In a kitchen oven, the air reaches its set temperature long before a steel or stone does. In Modernist Pizza’s infrared photos, an oven that had beeped “ready” after 22 minutes still showed cold spots. Launch onto a surface that isn’t fully heated and the base lags while the top browns at its usual pace. The broiler makes that worse if it runs too long, because it adds heat only from above.
In a portable pizza oven, the dome and flame are far hotter than any kitchen oven, so the stone has to keep up. If you launch before the stone is hot, or before it has recovered from the last pizza, the top races ahead.
The cheese itself slows the dough beneath it. Modernist Pizza explains that mozzarella takes a lot of energy to melt and holds at its melting temperature until it has fully melted, delaying the dough underneath. It also turns whiter as it cooks and reflects more heat. A thick layer of cheese means a longer bake for the dough under it, and more time for the cheese on top to brown.
Fixes for a home oven with a steel or stone
- Preheat the surface, not just the air. Heat the steel or stone at the hottest setting your oven allows, usually 500 to 550°F (260 to 288°C). The Pizza Planner plans 45 to 60 minutes; some makers ask for longer, such as 60 to 75 minutes for the 3/8-inch Baking Steel Pro, so follow your steel or stone’s instructions. The dial shows the oven’s setting, not the surface: an infrared thermometer reads the surface, but bare or shiny metal reads low on most of them, so use it to compare one bake with the next rather than to match the dial. Turn off any convection fan while preheating, as Modernist Pizza advises.
- Move the rack. Ken Forkish bakes on a steel or stone on an upper rack no more than 8 inches below the broiler, and suggests trying the top position or the one below it until the toppings, base and rim finish together. If the cheese finishes first, move down one notch.
- Shorten or skip the broil. Forkish’s home method turns on the broiler for 10 minutes to recharge the steel, returns the oven to its highest bake setting once the pizza is in, and finishes some pizzas with about 2 minutes under the broiler, checking after 1. If the cheese is burning in that last stage, cut it short or leave it out. He skips it entirely for pizzas whose toppings scorch easily, such as sliced garlic.
- Add the cheese partway through. Forkish’s home margherita bakes with sauce only for about 4 minutes, until the rim just starts to turn golden. Then the mozzarella and basil go on for 1 to 2 more minutes, and a short broil finishes it. He suggests adding any moist, brine-packed mozzarella about halfway through the bake.
Expect a Neapolitan-style pizza to take about 6 to 10 minutes on a home steel or stone, and a New York pizza about 8 to 12, the same windows the Planner uses.
Don’t parbake by default
Holding the cheese back changes the pizza. Forkish adds his margherita’s mozzarella late partly to keep its texture: baked the whole time, he notes, it liquefies into something closer to a New York cheese pizza. A New York pizza wants that melt and shouldn’t need the delay. Forkish’s home version goes into a 550°F (290°C) oven fully topped with low-moisture mozzarella and bakes for 9 to 10 minutes. If a pizza like that burns on top, fix the heat balance first.
A first bake without toppings does belong in pan styles. The Planner’s Detroit and Sicilian methods bake the dough untopped for 10 to 12 minutes, then add the cheese and sauce for the rest of the bake, because a thick pan crust needs a long bake to cook through. For pan pizzas, keep the pan in the lower part of the oven, where the bottom gets more heat.
Fixes for a portable pizza oven
Measure the stone with an infrared thermometer before you launch. The Planner’s starting ranges for a gas pizza oven are a stone at 750 to 850°F (400 to 450°C) for Neapolitan-style pizza, which bakes in 1 to 2 minutes, and a lower, steadier 700 to 750°F (375 to 400°C) for a New York pizza, which takes 4 to 6.
Ooni’s own advice is to turn the flame down slightly after launching to avoid burning the top before the bottom sets, and to rotate the pizza during the bake. Between pizzas, wait a few minutes for the stone to recover, then check it again before the next launch.
The cheese matters too
Moisture is part of it. As Modernist Pizza explains for dough, a wet surface can’t get much hotter than the boiling point of water until it dries, and browning only starts once it does. A 2025 lab study that heated eight cheeses at 212 to 392°F (100 to 200°C) found browning became noticeable once roughly 30% of their moisture had gone. It also found that temperature and the amount of cheese strongly affected how fast they dried, and that starting moisture explained only part of the differences between cheeses. So wetter fresh mozzarella generally takes longer to dry out and start browning, but water isn’t the whole story. Under US standards of identity, mozzarella holds more than 52% and no more than 60% moisture, while low-moisture mozzarella holds more than 45% and no more than 52%. Forkish notes that low-moisture mozzarella often browns more than the fresh, brine-packed kind.
Brands also differ. Forkish found that some low-moisture mozzarellas brown much faster than others, and learned to look for brands that were whiter in color. He also shreds his own from a block rather than buying it pre-shredded.
Three assembly habits help:
- Hard cheese goes underneath. Forkish puts grated Parmigiano or pecorino under the mozzarella, which keeps the dry cheese from scorching. Other delicate toppings can go under the cheese for the same reason.
- Don’t overload it. Forkish’s 12-inch margherita uses 80 to 100 g of fresh mozzarella, inside the Pizza Calculator’s starting range of 73 to 109 g for a 12-inch Neapolitan-style pizza.
- Sauce over cheese shields it. Putting the cheese down first and the sauce on top keeps the cheese under a wet layer that stays near the boiling point. Modernist Pizza found this order also produces a much smaller gummy layer under the sauce. The trade-off is the look: no melted cheese on top.
For more on the two cheeses, see low-moisture vs. fresh mozzarella. If the problem is a pale base whatever the cheese does, see pizza crust not browning.
Frequently Asked Questions
- Should I parbake the crust so the cheese doesn't burn?
- Only where the style calls for it. The Planner's Detroit and Sicilian pan methods bake the dough untopped for 10 to 12 minutes first. For a thin round pizza, fix the heat balance before you parbake: Forkish bakes his New York cheese pizza fully topped for 9 to 10 minutes at 550°F (290°C). If you use fresh mozzarella, adding it partway through, as Forkish does in his margherita, is a lighter change than a full parbake.
- Is fresh or low-moisture mozzarella better if my cheese keeps burning?
- Fresh mozzarella holds more water (52 to 60% under US standards, against 45 to 52% for low-moisture), so it generally takes longer to start browning, but it releases that water into the pizza. Low-moisture mozzarella browns more readily, and some brands brown much faster than others; whiter ones tend to brown more slowly. If low-moisture cheese burns, try another brand before you change the method.
- Why does the cheese burn in my pizza oven before the base is done?
- Usually the stone isn't as hot as the flame and dome. Check the stone with an infrared thermometer before launching, turn the flame down slightly after the pizza goes in, as Ooni recommends, and rotate the pizza as it bakes. Later pizzas need a few minutes for the stone to recover.
Sources
- Nathan Myhrvold and Francisco Migoya, Modernist Pizza (2021), volume 1, page 357 (the mirror-shield experiment on radiant heat), pages 363–365 (how a wet surface holds near boiling before it browns), pages 370–371 (cheese before sauce and the gel layer), pages 372–373 (how cheese melts and reflects heat) and pages 391–392 (preheating and the convection fan).
- Ken Forkish, The Elements of Pizza (2016), chapter 4 (fresh and low-moisture mozzarella), chapter 5 (step 9, baking with the broiler) and chapter 7 (notes on toppings, Pizza Margherita and New York Cheese Pizza).
- Justyna Tarapata, Ewa Szymańska, Liesbeth van der Meulen, Joost Miltenburg and Thom Huppertz, “Moisture Loss from Cheese During Baking: Influence of Cheese Type, Cheese Mass, and Temperature”, Foods 14(2):165 (2025).
- US Code of Federal Regulations, 21 CFR 133.155 and 133.156: moisture ranges for mozzarella and low-moisture mozzarella.
- Baking Steel: Baking Steel Pro product page (preheat 60 to 75 minutes at 500 to 550°F). Checked October 14, 2026.
- Ooni: pizza stone guidance (turning the flame down after launch, rotating) and its guide to baking for a crowd (stone recovery between pizzas). Checked October 14, 2026.