A soggy centre with a crisp rim is the most common home pizza failure, and it is almost always moisture rather than heat. The fix is in what goes on top.
Where the Water Comes From
Sauce, obviously. Fresh mozzarella, which is stored in liquid. Vegetables, which release water as they cook. And any topping added raw that would normally be cooked separately.
All of that moisture has to leave during a bake measured in minutes. In a short high-temperature bake there is not enough time, so it sits on the base and steams it from above.
The High-Heat Advantage
A hotter oven tolerates more moisture, because the base sets before the water reaches it. Ovens running at around 800°F on a stone, of the kind at piezano.net, are considerably more forgiving of a slightly wet topping than a domestic oven at 480°F.
They do not make the problem disappear. A heavily loaded pizza is still a soggy pizza, just less so.
The Principle
Less is more, and drier is better. A professional pizza carries considerably less topping than most people assume, and that is a technical decision rather than economy.
- Sauce thinly, in a single layer, not to the very edge
- Drain fresh mozzarella and pat it dry, or use low-moisture
- Pre-cook anything watery: mushrooms, courgette, spinach, onions
- Slice thinly rather than thickly, so heat penetrates
- Add delicate items after the bake: rocket, fresh basil, prosciutto
Cheese
Fresh mozzarella tastes better and carries far more water. Low-moisture mozzarella browns better and stays drier.
Using fresh, drained, torn rather than sliced and used sparingly, is the compromise. Bagged pre-grated cheese contains anti-caking starch that stops it melting smoothly, which is why it can go grainy.
Sauce
Uncooked sauce is standard for high-temperature pizza: crushed tomatoes, salt, and nothing else. It cooks on the pizza.
Cooking the sauce beforehand reduces its water content, which suits a lower-temperature longer bake where the sauce has time to sit. For a four-minute bake at 800°F, uncooked is better and simpler.
Order Matters
Sauce, then cheese, then toppings is standard. Cheese under the toppings protects the base from their moisture.
Anything that burns easily, thin meats and small vegetables, benefits from going under the cheese rather than on top, particularly in a fast oven.
Testing It
Make two pizzas with the same dough, one topped as you normally would and one with half as much.
Most people find the sparse one better, which is a surprising and useful discovery.
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