This focaccia is the perfect appetizer for fall. A fluffy flatbread topped with roasted butternut squash, caramelized onion, fresh rosemary, gruyère, and a final drizzle of balsamic glaze.
This focaccia is bright and seasonal—orange squash, dark balsamic, and a pop of rosemary make it ideal for autumn gatherings. It’s festive without being kitschy, and it’s a great choice for a Halloween party when you want something themed but still delicious.
When I was a child we had a school activity called “see-and-touch” where messy foods were labeled as spooky items. I remember jars of sun-dried tomatoes labeled “newts,” which made me wary of the real thing for a long time. I still prefer less creepy food, so this focaccia—with its warm, savory flavors—is a much more appealing fall treat.
Start by preparing the dough. Combine yeast, warm water, and sugar and let it rest until foamy—about 10 minutes. This step confirms the yeast is active. Mix in flour, salt, and olive oil, then knead until the dough is smooth and elastic. Let the dough rise until doubled in size; when it is properly risen you’ll see delicate strands in the dough that show good gluten development.
While the dough rises, caramelize the onions slowly with a couple of rosemary sprigs in olive oil until they are soft and golden. This brings out their natural sweetness and adds depth to the focaccia. Meanwhile, cook the butternut squash either by roasting or sautéing until the cubes are tender and lightly caramelized. Season the squash with salt, pepper, and a touch of oil before cooking.
When the dough has risen, press it onto a sheet pan oiled with olive oil. Use your fingertips to stretch the dough evenly, creating dimples across the surface. Scatter the cooked butternut squash and caramelized onions over the dough, tuck in rosemary leaves, and grate gruyère evenly across the top. A generous sprinkle of salt and a little pepper at this stage help to balance the sweetness of the squash and onions.
Bake in a hot oven until the focaccia is golden and the cheese is melted—about 15–20 minutes at 400°F. If you like a crispier bottom, bake directly on a preheated sheet or stone. Once out of the oven, slice into squares and drizzle with a little balsamic glaze to add acidity and contrast to the rich flavors.
This focaccia is versatile: use more or less cheese to suit your taste, add a handful of arugula after baking for freshness, or substitute pecorino or fontina if you prefer. It makes a hearty appetizer, a shareable side, or even a simple weeknight dinner when paired with a salad.
Butternut Squash and Caramelized Onion Focaccia
Ingredients
- 2 1/4 tsp instant yeast
- 1 1/4 cups warm water (about 110°F)
- 1 1/2 tbsp sugar
- 17.5 oz all-purpose flour by weight (about 3.5 cups measured)
- 1 tsp salt
- 1/4 cup + 1/4 cup + 2 tbsp olive oil (divided)
- 2 medium yellow onions, sliced
- 2 sprigs fresh rosemary
- 3 lb butternut squash, peeled, seeded, and cut into cubes
- 2 oz gruyère cheese (or more to taste)
- Salt and pepper, to taste
- Balsamic glaze, for drizzling
Instructions
- In the bowl of a stand mixer, combine the yeast, warm water, and sugar. Stir and let sit for 10 minutes until the surface is foamy.
- Add the flour, salt, and 1/4 cup olive oil. Stir to combine, then fit the mixer with the dough hook and knead on medium-low for 10 minutes until the dough is smooth and elastic. Cover and let rise for one hour, until doubled in size.
- While the dough rises, heat 2 tbsp olive oil in a large skillet over medium heat. Add the sliced onions, rosemary sprigs, a pinch of salt, and pepper. Cook slowly for 20–30 minutes, stirring occasionally, until the onions are soft and caramelized. Remove and discard the rosemary stems, keeping the leaves.
- Prepare the butternut squash by seasoning the cubes with salt, pepper, and a little oil. Either sauté the cubes in a skillet for about 20 minutes until tender, or roast them at 400°F for 15–20 minutes until softened and lightly browned.
- Preheat the oven to 400°F. Pour the remaining 1/4 cup olive oil onto a sheet pan and spread it evenly. Stretch the risen dough onto the pan using your fingertips, creating dimples across the surface.
- Distribute the cooked squash and caramelized onions over the dough. Sprinkle with rosemary leaves, salt, and pepper. Grate the gruyère evenly on top.
- Bake for 15–20 minutes, until the cheese is melted and the focaccia is cooked through. The internal temperature should reach about 200°F, or the bread should pull apart cleanly. Remove from the oven, slice into pieces, and drizzle with balsamic glaze if desired. Serve warm.
Nutrition (per serving, estimated)
Calories: 184 kcal, Carbohydrates: 32 g, Protein: 4 g, Fat: 4 g, Saturated Fat: 1 g, Sodium: 144 mg, Fiber: 2 g. Nutrition is an estimate for informational purposes only.
Course: Appetizer • Cuisine: Italian • Author: Fifteen Spatulas
Enjoy this comforting focaccia while the weather cools. It’s excellent for sharing, easy to adapt, and a flavorful way to showcase fall produce.