05/13/2026
Italian Baked Onions
This is one of those old Italian side dishes that proves onions can be more than a background ingredient. Bake them slowly with olive oil, salt, pepper, and herbs, and they turn sweet, soft, golden, and almost creamy inside.
Prep time: 10 minutes
Cook time: 45–60 minutes
Total time: about 1 hour 10 minutes
Serves: 4
Ingredients
4 large yellow onions, white onions, or red onions
3–4 tablespoons extra-virgin olive oil
Salt, to taste
Black pepper, to taste
1–2 teaspoons dried oregano, or a few fresh thyme/rosemary leaves
1–2 tablespoons breadcrumbs, optional
1–2 tablespoons grated Parmesan or Pecorino Romano, optional
A splash of white wine or water, optional if the pan gets dry
Equipment
Baking dish
Sharp knife
Cutting board
Small spoon
Aluminum foil
Pastry brush or spoon
Oven
Instructions
Preheat your oven to 375°F. Peel the onions, then cut them in half from top to bottom. Trim just a little from the root end, but don’t remove too much. Keeping part of the root helps the onion halves stay together while baking.
Place the onions cut-side up in a baking dish. Drizzle them generously with olive oil, then season with salt, black pepper, and oregano or herbs. Use your fingers or a spoon to push a little oil and seasoning between the onion layers (that’s where the flavor sneaks in).
Cover the dish with foil and bake for 30–35 minutes, until the onions start to soften. At this stage they should smell sweet and look slightly translucent, but they won’t be deeply browned yet.
Remove the foil, spoon some of the pan juices back over the onions, and continue baking uncovered for another 15–25 minutes. The tops should become golden and the centers should be very tender. If the pan looks dry, add a small splash of white wine or water.
For a richer finish, sprinkle the onions with breadcrumbs and Parmesan or Pecorino during the last 10 minutes of baking. Let the topping turn lightly golden, not burnt.
Serve warm or at room temperature. These are beautiful next to roasted meat, grilled chicken, fish, sausages, potatoes, or even on toasted bread.
Tips
Use onions that are similar in size so they cook evenly.
Red onions become sweeter and softer, while yellow onions give a deeper classic flavor.
Don’t rush the baking. The sweetness comes from slow softening.
Cover first, then uncover to brown.
A little cheese and breadcrumbs make it more rustic and satisfying.
Storage
Store leftovers in the fridge for 3–4 days.
Reheat in a 350°F oven until warm, or serve at room temperature with a drizzle of olive oil.