Salt is a small part of the dough by weight, but you’d notice it gone. Its main job is flavor. It also changes how the dough feels, how fast it ferments and how the crust colors.
What salt does
Modernist Pizza describes four effects:
- Flavor. That’s its primary function. Some of the least favorite pizzas the authors ate on their travels had chronically undersalted dough.
- Structure. You can see the difference soon after mixing: dough without salt is slack and sticky. Gluten proteins naturally repel one another, and the chloride ions from dissolved salt help them overcome that and bond, building bubble walls that can hold more gas. In reasonable amounts, which the authors put at 2 to 2.5%, salt can increase the dough’s volume. That’s not a promise that more salt means more rise.
- Fermentation. Salt slows yeast down by putting osmotic pressure on the cells. Without it, the yeast ferments too fast and the dough’s structure suffers. Like cold proofing, that slower pace brings richer flavor and a darker crust.
- Color. Unsalted dough bakes into a relatively pale crust, because the yeast uses up the sugar that would otherwise brown in the oven.
More salt slows fermentation further, and Modernist Pizza calls oversalted dough unpleasant. A saltier dough isn’t automatically a mistake, but it needs a recipe designed around the slower fermentation. King Arthur Baking’s Neapolitan-style crust, for example, uses 8 g of salt to 232 g of flour, about 3.45% (calculated).
Salt is also hygroscopic: it attracts water. Added at the very start of mixing, Modernist Pizza notes, it interferes with how the gluten proteins hydrate, even as it helps them bond. That’s one reason recipes disagree about when to add it.
How much salt
There’s no single right amount, as Ken Forkish says, but the published range is fairly narrow:
| Source or recipe | Salt, % of flour | Context |
|---|---|---|
| Modernist Pizza’s recommendation | 2–2.5% | Seasoning; control fermentation with yeast and temperature |
| Pizzaioli in Naples, as Modernist Pizza found them | 1.5–3.5% | Some vary it by season |
| Most published pizza recipes, per Forkish, and his own pizzeria | About 2% | |
| Forkish’s 24- to 48-hour dough | 2.6% | Refrigerated |
| Forkish’s New York and Overnight Levain doughs | 2.8% | |
| Forkish’s Saturday dough, based on the AVPN rules | 3% | Ferments at room temperature all day |
The Pizza Planner sets salt by style: 3% for Neapolitan-style, 2.8% for New York, 2.5% for Detroit, about 2.2% for Sicilian-style and 2% for Roman tonda. You can change it between 1.6 and 3.2% in its Fine-tune panel.
Why Neapolitan dough uses 3%
Forkish thought the 3% in Neapolitan and Roman recipes was a typo until he read the rules of the Associazione Verace Pizza Napoletana (AVPN). His explanation is practical. Neapolitan pizzerias prefer to ferment their dough at room temperature rather than in a fridge, and many have no room to refrigerate it anyway. Without refrigeration, a long-fermented dough with less salt would blow out, getting too gassy halfway through an evening’s service. More salt tempers the fermentation so the dough balls hold longer.
That’s why his Saturday dough, which spends the whole day on the counter, uses 3%, and why he says its balls can hold for 4 hours at room temperature after their second fermentation.
Modernist Pizza takes issue with one Naples habit: varying the salt with the season, more in summer and less in winter, to control fermentation. Their objection is that the crust then tastes different from one season to the next. Their advice is to keep the salt fixed for flavor and change the yeast or the dough temperature instead.
The Planner works the same way. Each style’s salt stays put, and choosing a schedule changes the yeast: for a hearth pizza in a home oven, 0.06% instant yeast for same-day, 0.3% overnight and 0.24% for the 48-hour cold schedule.
When to add it
Published methods differ, and both work in normal mixing:
- Salt first, in the water. The Neapolitan order, which Forkish follows: dissolve the salt in the water, then dissolve the yeast in that salted water, then add the flour. In the dough’s full measure of water, that’s a dilute brine.
- Salt after an initial mix. Modernist Pizza’s artisan pizza dough is mixed to a shaggy mass and some gluten development before the salt goes in.
Either way, what matters is that the salt ends up completely dissolved and evenly spread through the dough. Undissolved salt leaves concentrated pockets that, Modernist Pizza says, are bad for the yeast and unpleasant to bite into. That’s not the same as leaving yeast sitting in dry salt or a strong salt solution, so keep those apart until you mix.
Which salt, and why to weigh it
Modernist Pizza’s view is that all culinary salts are functionally the same once dissolved. Mineral-rich salts may add a subtle flavor sprinkled on top, but it’s virtually impossible to taste in a baked crust. What matters for dough is how easily the salt dissolves, which is why they recommend fine salt. If you use kosher or another coarse salt, stir it in the water until it has fully dissolved; hot water doesn’t help salt dissolve.
Crystal shape also changes how much salt fits in a spoon. From Modernist Pizza’s table:
| Salt | Weight of 1 tablespoon |
|---|---|
| Diamond Crystal kosher salt | 9.6 g |
| Morton Mediterranean sea salt (fine) | 16.33 g |
| La Baleine sea salt (fine) | 16.63 g |
| Morton kosher salt (coarse) | 17.63 g |
| Morton table salt (plain) | 19.5 g |
So 17 g of salt is about 1¾ tablespoons of Diamond Crystal but under 1 tablespoon of Morton table salt (calculated). Swap one for the other by the spoon and you can double the salt. Weigh it.
Scaling salt with the recipe
Salt is a percentage of the total flour, so its weight scales with the batch:
| Batch (Pizza Planner) | Total flour | Salt |
|---|---|---|
| Four 12-inch Neapolitan-style pizzas, home oven | 577 g | 17 g (3%) |
| Four 14-inch New York pizzas | 886 g | 25 g (2.8%) |
| One 10 × 14-inch Detroit pan | 431 g | 11 g (2.5%) |
| Forkish’s Saturday dough, 3 dough balls | 500 g | 15 g (3%) |
If the recipe has a poolish or sourdough levain, count the flour inside it too. A Neapolitan-style dough with 30% of its flour in a poolish still has 577 g of flour in total, so it still takes 17 g of salt, all of it in the final mix. More on the arithmetic in baker’s percentages explained.
Sources
- Nathan Myhrvold and Francisco Migoya, Modernist Pizza (2021), volume 1: pages xxvi–xxvii, the introductory sample-recipe pages (the sample artisan pizza dough’s mixing order), page 292 (salt as a fermentation control), page 313 (what salt does, sourcing salt and dissolving it) and page 314 (salt conversions and how much salt to add).
- Ken Forkish, The Elements of Pizza (2016): chapter 3 (detail 6, the Neapolitan mixing order; detail 8, the role of salt) and chapter 6 (salt in the Saturday, I Slept In, 24- to 48-hour, New York and Overnight Levain doughs).
- King Arthur Baking: Neapolitan-Style Pizza Crust (salt and flour weights). Checked October 14, 2026.