Troubleshooting · symptom → cause → fix
The mozzarella burns before the pizza is done
The cheese is black and burnt at the edges – or all over – before the base and the rest of the pizza have finished baking.
Most likely cause
Too much cheese in a dense, unbroken layer
How you know: The cheese covers the whole surface edge to edge in a thick, continuous layer with no air between the pieces.
Do this: Weigh the cheese – around 80–100 g is enough per pizza – and scatter it in loose clumps rather than a solid blanket, see mozzarella.
Other possible causes
-
The cheese is sliced too thin or grated too fine
- How to tell
- The cheese is grated into fine strands or cut into thin slices that dry out and burn quickly instead of melting evenly.
- Fix
- Cut the cheese into coarser pieces or cubes instead – they handle the heat better and melt more evenly without turning into crisp flakes.
-
Too long a bake for the amount of cheese (most common in a home oven)
- How to tell
- The problem mainly shows up with a 5–12 minute bake in a home oven, rarely in a wood-fired oven at 60–90 seconds.
- Fix
- Cut back the amount of cheese slightly for the longer bake, or move the steel or stone down a shelf so the top doesn't get quite as concentrated heat from above.
Quick answer: burnt mozzarella is almost always down to too much cheese, slicing it too thin, or baking too long for the amount used – rarely the type of cheese itself.
The nerdy explanation
Mozzarella holds a lot of water, and as long as that water is still there, it protects the cheese from getting too hot. If the layer is thin or finely grated, it dries out quickly, and once the water is gone the cheese’s surface temperature shoots straight past melting point towards burning. Coarser pieces hold onto moisture longer and even out the heat better across the whole bake.
See mozzarella for amounts and types, baking temperature for how time and temperature relate, and soggy bottom if a lower temperature makes the base worse instead. More problems are in the troubleshooting section.
Frequently asked questions
Does lowering the temperature help?
Partly, but then the base risks turning chewy instead of crisp – see soggy bottom. Better to adjust the amount and slicing of the cheese first.
Should the cheese always go on before baking?
Yes, normally together with the sauce. Some people add a small extra amount of grated cheese right after baking for flavour, but the main portion needs to go on before, to melt properly.