Pinterest Image Flatbread – Crispy 50-Minute Dinner

There is a certain hour when the kitchen light turns amber and everything slows. That is when I make this flatbread, the one I first baked on a whim and photographed before I could stop myself.

It begins with a soft dough that rests while the onions melt into sweetness. The oven hums. Rosemary perfumes the air. By the time it comes out, the crust crackles faintly under the knife.

I have made it on quiet weeknights and for crowded tables. It behaves the same either way, generous and unhurried.

About the Ingredients

3 1/4 cups (410g) bread flour

Bread flour gives the chewy structure; all-purpose works but the crust will be softer. Look for a protein content near 12 percent on the label.

1 1/4 cups (300ml) warm water, about 100F (38C)

Too hot and it kills the yeast, too cold and the rise stalls. A quick touch with your wrist should feel barely warm.

2 1/4 tsp (7g) active dry yeast

One standard packet. If yours is older than six months, proof it in the water with a pinch of sugar first.

1 1/2 tsp fine sea salt

Fine salt dissolves evenly into the dough. Kosher salt works, but use a slightly heaped measure.

3 tbsp (45ml) olive oil, divided

A fruity extra-virgin finishes the top; a lighter oil is fine for greasing the pan. Save the best oil for the drizzle.

2 large yellow onions, thinly sliced (about 4 cups)

Yellow onions caramelize best; sweet Vidalia onions brown faster, so lower the heat slightly.

2 tsp fresh rosemary, finely chopped

Dried rosemary is stronger, so use 3/4 tsp. Strip the leaves from the stem with your fingers to keep them whole.

1 tsp flaky sea salt, for finishing

Maldon or another flaky salt adds a delicate crunch. Table salt will simply taste sharp here.

1/4 tsp freshly cracked black pepper

Crack it just before baking so the oils stay bright. Pre-ground pepper tastes flatter.

Tips & Tricks

• Do not rush the onions. Give them a full 25 minutes over medium-low heat, stirring only every few minutes, or they will steam instead of caramelize.
• Let the dough rest after shaping. A 10-minute pause relaxes the gluten so it stretches without springing back.
• Preheat the pan, not just the oven. A hot sheet pan sets the bottom crust instantly and prevents a soggy center.
• Resist overloading the toppings. A thin, even layer lets the crust crisp instead of steaming under the weight.

Step-by-Step Instructions

1. Bloom the yeast

Stir the yeast into the warm water and let it sit 5 minutes until a soft foam appears on the surface. If nothing happens, the yeast is dead and the dough will not rise.

2. Mix the dough

Add the flour, fine salt, and 2 tablespoons of olive oil, then stir with a wooden spoon until a shaggy mass forms. It will look rough and a little wild at this stage.

3. Knead until smooth

Turn the dough onto a floured counter and knead 6 to 8 minutes until it is smooth, elastic, and springs back when pressed. A tacky but not sticky surface is the goal.

4. Let it rise

Place the dough in an oiled bowl, cover, and let it rise in a warm spot for 60 to 75 minutes until doubled. It should feel airy and pillowy when you press it.

5. Caramelize the onions

Warm the remaining oil in a skillet over medium-low heat, add the onions, and cook 25 minutes, stirring occasionally, until deep amber and jammy. Lower the heat if they begin to scorch.

6. Shape and top

Heat the oven to 450F (230C) with a sheet pan inside. Stretch the dough into a 12 by 16 inch rectangle on parchment, brush with oil, and scatter the onions, rosemary, and pepper evenly.

7. Bake until golden

Slide onto the hot pan and bake 14 to 16 minutes until the edges are deeply golden and the surface bubbles at the corners. The crust should sound hollow when tapped.

8. Finish and serve

Sprinkle with flaky salt, rest 5 minutes, and cut into squares. The rosemary will smell sharp and warm as you slice.

Delicious Variations

Fig and Brie

Swap the rosemary for torn figs and brie, adding them in the last 6 minutes of baking.

Spicy Harissa

Stir a tablespoon of harissa into the onions and finish with lemon zest for a smoky edge.

Olive and Thyme

Replace rosemary with thyme and scatter sliced Kalamata olives over the top before baking.

How to Store Pinterest Image

Frequently Asked Questions

Make this flatbread on a slow evening and let the kitchen fill with rosemary and warm bread. Then tell me how it turned out, and what you scattered on top.

Pinterest Image

Pinterest Image flatbread is a golden, caramelized onion and rosemary bake that turns humble pantry dough into a showstopper dinner.

★★★★½ 4.8 (213 ratings)

25 minPrep time45 minCook time6Servings312 kcalCalories

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🧂 Ingredients

• 3 1/4 cups (410g) bread flour
• 1 1/4 cups (300ml) warm water, about 100F (38C)
• 2 1/4 tsp (7g) active dry yeast
• 1 1/2 tsp fine sea salt
• 3 tbsp (45ml) olive oil, divided
• 2 large yellow onions, thinly sliced (about 4 cups)
• 2 tsp fresh rosemary, finely chopped
• 1 tsp flaky sea salt, for finishing
• 1/4 tsp freshly cracked black pepper

📋 Instructions

1. 1Bloom the yeast — Stir the yeast into the warm water and let it sit 5 minutes until a soft foam appears on the surface. If nothing happens, the yeast is dead and the dough will not rise.
2. 2Mix the dough — Add the flour, fine salt, and 2 tablespoons of olive oil, then stir with a wooden spoon until a shaggy mass forms. It will look rough and a little wild at this stage.
3. 3Knead until smooth — Turn the dough onto a floured counter and knead 6 to 8 minutes until it is smooth, elastic, and springs back when pressed. A tacky but not sticky surface is the goal.
4. 4Let it rise — Place the dough in an oiled bowl, cover, and let it rise in a warm spot for 60 to 75 minutes until doubled. It should feel airy and pillowy when you press it.
5. 5Caramelize the onions — Warm the remaining oil in a skillet over medium-low heat, add the onions, and cook 25 minutes, stirring occasionally, until deep amber and jammy. Lower the heat if they begin to scorch.
6. 6Shape and top — Heat the oven to 450F (230C) with a sheet pan inside. Stretch the dough into a 12 by 16 inch rectangle on parchment, brush with oil, and scatter the onions, rosemary, and pepper evenly.
7. 7Bake until golden — Slide onto the hot pan and bake 14 to 16 minutes until the edges are deeply golden and the surface bubbles at the corners. The crust should sound hollow when tapped.
8. 8Finish and serve — Sprinkle with flaky salt, rest 5 minutes, and cut into squares. The rosemary will smell sharp and warm as you slice.

👨‍🍳 Chef's Note: A thin drizzle of good olive oil after baking softens the crust just enough without losing its snap.

Servings: 6

Cuisine: Mediterranean

Course: Main Course

Nutrition (per serving): 312 kcal · 8g protein · 48g carbs · 10g fat

Written by Ingrid Sørensen

Ingrid explores Scandinavian minimalist design and slow living. She writes about creating calm, functional spaces with fewer, better things.