Focaccia dimples are more than decoration: they control a gas-filled dough and create cavities where oil, salt, and sometimes brine can collect before baking. The result is an uneven surface with deeply browned high spots, moist pockets, and crisp edges.
King Arthur instructs bakers to press fingertips almost to the bottom of the pan without actually piercing through the dough.
Dimples redistribute oversized gas pockets
A well-fermented high-hydration focaccia can develop very large bubbles close to the surface. If baked untouched, some turn into domes that separate the crust from the crumb below.
Finger pressure breaks or shifts some of those pockets and redistributes gas. The bread remains airy but develops a more controlled structure.
Press deeply without flattening the whole dough
The technique works best with oiled fingers and firm but gentle movements. King Arthur recommends reaching the pan bottom without tearing through the dough itself.
Pressing with the palm or kneading the dough again would expel much more gas and destroy part of the volume built during fermentation.
Oil collects in the dimples
On a perfectly flat surface, oil would run more readily toward the edges. The indentations act as small reservoirs that keep oil in contact with the dough during baking.
King Arthur explicitly notes that it is fine for olive oil to pool in the dimples.
What does surface oil do?
Oil slows rapid moisture loss in selected areas while also supporting heat transfer and browning. The bottom and edges can become almost fried where dough contacts hot oil and metal.
Oil also carries rosemary, garlic, and herb aromas and creates the rich olive-oil flavor strongly associated with focaccia.
Brine is characteristic of some Ligurian styles
Not every focaccia uses brine, but Ligurian-style breads may receive a salty water mixture across the dimpled surface before baking.
Samin Nosrat describes how the brine dissolves salt and distributes it more evenly into the top of the dough rather than leaving salt only as crystals on the surface.
Surface water changes baking too
A small amount of water delays immediate drying inside the depressions. As it evaporates, those areas can remain slightly softer than the peaks exposed directly to oven heat.
The contrast between golden raised areas and moist depressions is part of classic focaccia texture.
When should you dimple focaccia?
Usually after the dough has completed its pan rise and shortly before baking. It should look visibly puffy.
Dimple too early and a long final rise may erase much of the pattern; handle an overproofed fragile dough too aggressively and it can collapse.
Why is there oil under the dough too?
Many recipes generously oil the pan. That oil prevents sticking and creates a bottom crust that can become especially crisp and fried in character.
This is why focaccia behaves differently from a lean hearth loaf on a stone: the pan and oil are part of the intended texture.
The irregular surface also holds toppings
Dimples give rosemary, olives, onions, and coarse salt places to settle instead of sliding toward the pan edges.
The practical rule: let focaccia become puffy, oil your fingers, and press deeply without flattening the whole dough. Add oil and, when the style calls for it, brine so those indentations hold flavor and moisture during baking.
Practice matters because small differences in pan, egg size, hydration, or fermentation change timing. Use texture and appearance as the main endpoint rather than one rigid clock time, then adjust the next batch in small steps.
Practice matters because small differences in pan, egg size, hydration, or fermentation change timing. Use texture and appearance as the main endpoint rather than one rigid clock time, then adjust the next batch in small steps.
Practice matters because small differences in pan, egg size, hydration, or fermentation change timing. Use texture and appearance as the main endpoint rather than one rigid clock time, then adjust the next batch in small steps.
Practice matters because small differences in pan, egg size, hydration, or fermentation change timing. Use texture and appearance as the main endpoint rather than one rigid clock time, then adjust the next batch in small steps.
Sources
- King Arthur Baking — Crisp & Airy Focaccia — Shows oiling and deep fingertip dimpling before baking without piercing through the dough.
- King Arthur Baking — Golden Focaccia — Explains that dimples can collect olive oil and uses warm water plus oil and coarse salt on the surface.
- King Arthur Baking — Everyone Loves Focaccia — Discusses Ligurian-style salty brine poured over dimpled focaccia so salt and moisture are distributed across the surface.
- King Arthur Baking — Big and Bubbly Focaccia — Emphasizes deep but gentle dimpling, oil pooling in dimples, and protecting the dough's gas structure.