Onion-topped pan focaccia
Caramelized Onion Focaccia
Deeply sweet, jammy onions cooked down slow and dark, spread over a golden crust — savory, mellow, and almost caramel-rich.
- Total
- 5.3 hr
- Hands-on
- 1 hr
- Hydration
- 78%
- Skill
- intermediate
By FocacciaRecipe editorial · Updated 2026-07-05 · In editorial development; independent bake-test pending
The short version
Cook sliced onions low and slow for 40–60 minutes until dark and jammy (do this ahead), cool them, spread over a dimpled focaccia, and bake at 225°C/435°F for 20–24 minutes.
Why this works
Caramelizing the onions fully before they meet the dough drives off their water and concentrates their sugars, so they season the bread without weeping moisture into the crumb; spreading them cool and jammy means they warm through and glaze rather than boil; the crust underneath stays crisp because the topping is already cooked dry.
The schedule
~1.2h hands-on of 5.4h total · same day
- Mix & fold · 1.2h
- Bulk ferment · 2h
- Proof · 1.5h
- Bake · 22m
- Cool · 20m
Terracotta is active work; olive is unattended rising; red is the bake.
Ingredients
Method
- 1
Caramelize the onions (ahead)
Cook the sliced onions with the oil and salt over medium-low heat, stirring often, 40–60 minutes until dark amber and jammy. Add the thyme near the end. Cool completely; they keep 3 days refrigerated.
Look for: Onions collapse to a fraction of their volume, turn glossy deep brown, and taste sweet with no raw bite.
Avoid: Keep the heat moderate and stir — rushing on high heat scorches the onions bitter instead of caramelizing them.
- 2
Mix the dough
Whisk flour and yeast, add water and the dough oil, then the fine salt. Mix to a wet, shaggy dough with no dry flour.
Look for: Sticky and loose, clinging to the bowl.
- 3
Bulk ferment with folds
Do 3 stretch-and-folds over the first 90 minutes, then rest until bubbly and nearly doubled.
Look for: Domed and blistered; airy and slack.
- 4
Pan and proof
Oil the pan, transfer the dough, coax it toward the edges, and proof until pillowy, 60–90 minutes.
Look for: It fills the pan and wobbles when nudged.
- 5
Dimple and top
Oil your fingers and dimple deeply, drizzle the finishing oil into the dimples, then spread the cool caramelized onions in an even layer, leaving a thin border.
Look for: A thin, even blanket of jammy onions — the dough still shows at the edges.
- 6
Bake, then cool
Bake at 225°C/435°F for 20–24 minutes until the crust is deep gold and the onion edges catch a little more color. Scatter flaky salt and cool on a rack 15–20 minutes.
Look for: Crust is gold and the onions glisten and darken slightly at the tips.
What good looks like
- Crumb: Open and tender under a soft onion layer.
- Crust: Crisp base; glossy, jammy top.
- Height: About 2.5–3.5 cm tall.
- Color: Deep gold crust with darker onion edges.
If something went wrong
| Symptom | Likely cause | Fix |
|---|---|---|
| Bitter, scorched onions | Caramelized too fast on high heat | Cook low and slow, stirring; pull them at deep amber, not black. |
| Soggy top | Onions added while still wet or under-cooked | Cook the onions until fully jammy and dry, and cool them before spreading. |
| Onions slide off in a sheet | Layer too thick and not pressed into dimples | Keep the layer thin and spread it into the dimpled surface. |
Storing & reheating
Storage: Best fresh; refrigerate up to 3 days.
Freezing: Freeze cooled pieces wrapped up to 1 month.
Reheating: Re-crisp in a 200°C/400°F oven for 6–8 minutes.
Contains wheat/gluten. Naturally vegan as written.
Tools & ingredients for this focaccia
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Core pantry
- Bread flour (opens Amazon) ↗ — High-protein bread flour or Italian “00” both work.
- Fine sea salt (opens Amazon) ↗ — Fine sea salt for the dough.
- Instant yeast (opens Amazon) ↗ — Instant (or active dry) yeast keeps for months.
- Extra-virgin olive oil (opens Amazon) ↗ — Use a good EVOO you like the taste of.
- Flaky finishing salt (opens Amazon) ↗ — For the crunchy finish.
Fresh — buy local
- Onions (opens Amazon) ↗ — A kitchen staple; buy fresh.
- Fresh herbs (opens Amazon) ↗ — Fresh is best; a windowsill pot works well.
You don’t need to buy everything here — many items are already in most kitchens. Fresh produce, cheese and herbs are best bought local and in season.
Frequently asked
- How far ahead can I make the onions?
- Up to 3 days refrigerated, or freeze them. Cool them fully before spreading so they glaze rather than steam the crumb.
- Is this the same as Ligurian onion focaccia?
- It is influenced by that tradition but written as a home adaptation with fully caramelized onions, rather than a claim to any specific regional product.
Keep baking
In these collections
Source: https://www.focacciarecipe.com/recipes/caramelized-onion-focaccia · © 2026 FocacciaRecipe.com
In editorial development — this recipe has not yet completed physical bake-testing.