No leopard-spotting on the cornicione

What you're seeing

The rim came up well. Puffed, the crumb inside open, tasting like it should — and one flat, even tan the whole way round, like a bread roll. None of the dark, nearly black blisters that make a Neapolitan crust look Neapolitan. You might get a few pale bubbles where the grill caught them, but the shoulder and underside of the cornicione stay uniformly beige. Nothing is wrong with the pizza; it just does not look like the photographs, and more time has never fixed it.

The short answer

Leoparding is not a browning problem but a charring problem, and charring needs heat most kitchens cannot produce. The spots are the burnt tops of gas bubbles sitting immediately under the skin of the rim, forming when a well-fermented dough meets a floor around 400 °C (750 °F) for 60–90 seconds. You can get part of the way at home — steel on the top rack, grill flat out, a long cold ferment — but real leoparding needs a pizza oven.

Why it happens

A spot is a blistered bubble, not a browned patch

During fermentation, carbon dioxide collects in thousands of gas cells. When the pizza lands on a hot floor, the cells nearest the surface expand hard and fast, pushing the skin into a field of tiny domes. The membrane over each dome is thin enough to see light through and carries almost no water, so it dries within seconds — and once dry, nothing holds its temperature down. It races past the 150 °C (300 °F) where the Maillard reaction begins and keeps going until it chars, while the dough two millimetres below is still stuck at 100 °C (212 °F).

That gap is the whole effect: dark spots on a pale field mean two neighbouring points on one surface are hundreds of degrees apart.

Even browning and spotting are different bakes

Browning is patient: give any surface enough time above about 150 °C (300 °F) and it colours evenly. Charring is impatient — a small area must blow past browning range in seconds while its neighbours cannot keep up. In a 250–290 °C (480–555 °F) oven over 6 or 7 minutes, heat arrives slowly enough that the whole rim dries and browns together. Push it further and you get a uniformly dark rim and a dry crust, which is the pale-base problem solved in the wrong direction.

The dough has to have the bubbles to begin with

No fermentation, no blisters. A rushed two-hour bulk gives a few coarse pockets; a long, cool ferment gives many fine ones spread evenly under an extensible skin — exactly the structure that domes. Flour choice follows the schedule: Caputo Pizzeria (the red bag) sits around W260–280 at roughly 12.5% protein and is built for an 8–24 hour ferment, while Caputo Chef's (the blue bag) runs W300–320 at about 13% and holds up over 24–72 hours. Push the red bag to three days and the gluten degrades before the spots ever arrive — our Caputo against King Arthur comparison sets out the trade, and the cold fermentation guide covers the schedule.

Handling matters as much as timing. Press the outer two centimetres of the disc, or run a rolling pin over it, and you crush the cells you spent two days building; the rim bakes up dense and bready instead of blistered. A heavy coat of bench flour does the same from outside — it insulates the skin and soaks up the moisture leaving it, so the membrane never gets the runaway dry-out that makes a spot.

Your floor is a couple of hundred degrees short

This is the part no technique fixes. A Neapolitan oven puts the floor at 430–480 °C (800–900 °F) with a dome radiating back down; a domestic oven tops out at 250–290 °C (480–555 °F), and a steel in it settles near the air temperature unless you drive it with the grill/broiler. Steel conducts roughly 18 times faster than cordierite (~45 W/m·K against ~2.5), so a baking steel gives you the fastest bake available at home — but conduction moves stored heat, it does not create heat you never had.

Fix it now

1. Steel on the top rack, oven at maximum, 45–60 minutes, timed from the beep. Close to the roof is where the radiant heat is.
2. Run the grill for the last 10 minutes of preheat. It pushes the steel and the oven roof past where the thermostat would settle.
3. Read the slab, not the dial. Point an IR gun at a dark, seasoned patch of the steel, not at bare metal — polished steel reflects infrared and can read tens of degrees low. Read the same spot each time. Below 250 °C (480 °F) you are baking, not spotting.
4. Leave the rim alone when you stretch. Press from the centre out and keep your hands off the outer 2 cm.
5. Knock the flour off. Lift the dressed base at one edge and shake the peel hard; loose flour should fall away. Semolina, and very little of it.
6. Bake hot and short with the grill on. 4–6 minutes on the top rack, element running. If nothing has blistered by minute five, take it out; extra time only dries the crust.
7. Dress it light. A classic margherita is 80–100 g of sauce and 100–120 g of cheese for a reason: a heavy pizza needs a long bake, and a long bake has no spots in it.

Prevent it next time

• Cold ferment 24–48 hours at 4 °C (39 °F). More gas cells, finer gas cells, and more free sugar at the surface to char.
• Match the flour to the schedule. W260–280 for 8–24 hours, W300–320 for 24–72. A dough that has gone slack has lost the skin that holds a dome.
• Stay around 62–65% hydration at home. Much wetter and the skin holds water longer, which is exactly what a low-temperature oven cannot afford. Set the ratios with the Neapolitan calculator.
• Do not add sugar or malt to chase spots. They give even brown, not blisters, and at high heat scorch the base before the rim does anything interesting.
• Be honest about the ceiling. In a domestic oven, scattered blisters and a well-browned rim is it. Everything above that line is bought, not baked — and whether that purchase is worth making is a fair question, which our honest home-oven guide works through case by case.