Guide
The Five Focaccia Ingredients and What Each One Does
Flour, water, salt, yeast, and olive oil — the job each ingredient does in the dough, and how to choose a good version of it.
By FocacciaRecipe editorial · Updated 2026-07-06
Quick answer
Focaccia needs just five things: flour for structure, water to hydrate it and enable gluten, salt for flavour and controlled fermentation, yeast for the rise, and olive oil for flavour and its signature fried, tender crust. Weighing them in grams is the surest way to get consistent results.
Flour: the structure
Flour is the backbone. Its proteins, when wetted and worked, link into gluten — the elastic network that traps gas and lets the dough rise. Its starches gelatinise in the oven and set the crumb. In baker’s math, flour is always 100%, and every other ingredient is measured against it.
For a first focaccia, all-purpose flour (roughly 10–11% protein) works well and is easy to handle. Bread flour (12–14% protein) makes a chewier, slightly more elastic crumb and can carry higher hydration; it is a good next step, not a requirement. Italian "00" flour is finely milled and traditional for some styles but is not necessary. Avoid cake flour and self-raising flour — they lack the protein or contain leavening that will throw the recipe off.
Water: the activator
Water does more than moisten. It hydrates the flour so gluten can form, it dissolves the salt and feeds the yeast, and its amount relative to flour — the hydration percentage — largely sets how open and tender the crumb will be. Focaccia typically runs 70–85% hydration, which is why the dough is wet and slack rather than firm.
Tap water is fine for almost everyone. Its temperature is a useful lever: warm water (not hot — keep it under about 40°C / 104°F, which is comfortably warm to the wrist) nudges fermentation faster, while cooler water slows it and gives you more control. Very hot water will kill yeast, so when in doubt use lukewarm.
Salt: flavour and control
Salt makes bread taste like bread — unsalted dough bakes up flat and bland. But it also does structural work: it tightens the gluten network slightly, making the dough less sticky and more extensible, and it moderates the yeast, slowing fermentation to a steadier pace so flavour can develop. A common range is about 2% of the flour weight by weight.
Any pure salt works in the dough, but weigh it rather than measuring by spoon, because flaky and fine salts have very different volumes for the same weight — a teaspoon of fine salt is far more salt than a teaspoon of flaky salt. For the finishing sprinkle on top, a flaky sea salt is worth having: its crunch and bright pops of saltiness are part of what makes focaccia focaccia.
Yeast: the rise
Yeast ferments the sugars in the dough, producing carbon dioxide that inflates the gluten network and gives focaccia its airy lift, along with alcohol and acids that build flavour. For beginners, instant (also called fast-action or quick-rise) yeast is the easiest: it can be stirred straight into the flour without dissolving first.
Active dry yeast works too, but soften it in a little of the warm water first. Fresh (cake) yeast is used in many Italian kitchens and is lovely but perishable. As a rough conversion, instant yeast is a touch stronger than active dry — if a recipe gives one and you have the other, they are close enough to swap 1:1 for a beginner bake. Use less yeast for a longer, tastier ferment; more only when you need speed.
Olive oil: the signature
Olive oil is what separates focaccia from a plain flatbread. It goes in three places: a little in the dough for tenderness and flavour, a generous coat in the pan, and a drizzle over the top before baking. The pan oil is the secret to the crust — the dough effectively shallow-fries against the hot metal, turning the bottom and edges crisp and deeply golden.
Because the oil is so prominent, its taste comes through in the finished bread, so use one you like eating. A decent extra-virgin olive oil for the dough and finish is worth it; some bakers use a milder or cheaper oil to coat the pan and save the good stuff for the drizzle. Do not skimp on quantity — under-oiling is a frequent beginner mistake that gives a pale, dry, stuck-on result.
Frequently asked
- Can I make focaccia without olive oil?
- You can bake bread with another oil, but it will not really be focaccia — the olive oil flavour and the oil-fried crust are defining features. If you must substitute, a neutral oil will give crispness but not the characteristic taste.
- Does the type of yeast really matter for a beginner?
- Not much. Instant yeast is the most convenient because you stir it into the flour directly. Active dry works if you soften it in warm water first. Either makes good focaccia.
- Why should I weigh ingredients instead of using cups?
- A cup of flour can vary by 20% or more depending on how it is scooped, which changes your hydration significantly. Weighing in grams removes that variability and is the single biggest reliability upgrade for a beginner.
- Is bread flour worth buying?
- It is a nice upgrade, not a necessity. Bread flour gives a chewier crumb and handles high hydration well. All-purpose flour makes perfectly good focaccia, so start with what you have.