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Prep Time:
30 mins
Cook Time:
25 mins
Additional Time:
4 hrs 15 mins
Total Time:
5 hrs 10 mins
Servings:
8 to 10
Yield:
1 (9×13-inch) pan
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Focaccia Base
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2 cups lukewarm water
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1 (0.25-ounce) packet active dry yeast, such as Red Star®
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1/2 teaspoon sugar
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2 tablespoons olive oil
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1 tablespoon kosher salt
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3 cups all-purpose flour
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2 cups bread flour
French Onion Soup Toppings
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olive oil, as needed
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2 tablespoons unsalted butter
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2 yellow onions, cut into half moons
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kosher salt, to taste
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1 cup grated Gruyère cheese
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1/2 teaspoon herbes de Provence or dried thyme
Directions
For the focaccia: Pour water into a large bowl and sprinkle yeast and sugar on top. Mix briefly with a dough whisk or wooden spoon, then let sit until the yeast has bloomed, about 10 minutes. When ready, the top of the bowl should look like a foamy beer.
Stir in olive oil and salt. Add all-purpose flour and bread flour and stir with the dough whisk or a wooden spoon until no dry streaks of flour remain.
Cover the bowl and allow to rise for 45 minutes. After 45 minutes, uncover the bowl and wet your hands slightly. Starting at the top of the bowl, use your wet hands to pull the top edge of the dough up and over the dough ball. Continue this process until you work your way all around the dough. This is known as a stretch and fold. It helps to develop gluten and replaces traditional kneading. Cover the bowl again and let sit in a warm spot.
After 30 minutes, repeat the stretch and fold process. Cover the bowl and perform two more sets of stretches and folds 30 minutes apart. After the 4th stretch and fold, cover the bowl and let sit for 30 minutes.
At this point, the dough should have doubled in volume and be smooth to the touch. The dough is now ready to be used, or can be chilled overnight to use the next day.
For the toppings: Lightly oil a 9×13-inch metal cake pan. Set the focaccia base in the pan, using your fingers to gently stretch it into all four corners. Cover the focaccia and let rise for about 1 hour.
Meanwhile, melt butter in a light-colored skillet over medium heat. Add onions and a generous pinch of salt and cook over medium-low heat, stirring often until onions are deeply caramelized, about 40 minutes. As the onions cook, you may need to add water, 1/4 cup at a time, to keep the onions from burning. After 40 minutes, onions should be deeply browned and jammy in consistency. Remove from heat and set aside to cool slightly.
Preheat the oven to 450 degrees F (230 degrees C).
Lightly drizzle the surface of the focaccia with olive oil. Use your fingers to dimple the surface, then scatter Gruyère cheese in an even layer. Dimple the surface again, then dollop onions all over the surface. Sprinkle with herbes de Provence.
Bake in the preheated oven until the focaccia and cheese are golden brown and bubbly, 25 to 30 minutes.
Remove from the oven and let sit in the pan for about 10 minutes, then carefully slide focaccia onto a cutting board. Let cool for an additional 10 minutes before slicing and serving.
Cook’s Note
If you prefer to weigh ingredients for the focaccia base with a kitchen scale, here are the ingredients by weight: 500 grams lukewarm water, 1 (7 gram) packet active-dry yeast, 1/2 teaspoon sugar, 30 grams olive oil, 15 grams kosher salt, 400 grams all-purpose flour, and 250 grams bread flour.
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Nutrition Facts (per serving)
350
Calories
11g
Fat
51g
Carbs
11g
Protein
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Nutrition Facts
Servings Per Recipe
8 to 10
Calories
350
% Daily Value *
Total Fat
11g
14%
Saturated Fat
4g
21%
Cholesterol
19mg
6%
Sodium
494mg
21%
Total Carbohydrate
51g
19%
Dietary Fiber
2g
8%
Total Sugars
1g
Protein
11g
22%
Vitamin C
1mg
1%
Calcium
132mg
10%
Iron
2mg
12%
Potassium
116mg
2%
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.
(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.