Description
This Caramelized Onion Pasta recipe combines sweet, richly caramelized onions with tender pasta and a savory touch of parmesan and fresh parsley. Slow-cooked onions develop deep flavor that coats every bite, making a comforting, elegant dish perfect for a cozy meal.
Ingredients
For the Caramelized Onions
- 2 tablespoons olive oil
- 4 medium yellow onions, halved and sliced
- 1/2 teaspoon salt (plus more to taste)
- 1 teaspoon granulated sugar (optional, to help caramelize)
For the Pasta and Finishing
- 12 ounces pasta of choice
- 1/2 to 1 cup shredded parmesan (non-dairy, e.g., Violife shaved parmesan)
- 2–3 tablespoons chopped fresh parsley
- Fresh ground black pepper, to taste
Instructions
- Heat the olive oil: Warm 2 tablespoons of olive oil over medium heat in a large sauté pan to prepare for cooking the onions evenly.
- Cook the onion slices: Add the sliced yellow onions to the pan and stir to coat them evenly in the olive oil. Spread them out evenly in the pan and cook, stirring every few minutes to avoid burning.
- Add salt and sugar: After about 10 minutes, sprinkle 1/2 teaspoon salt and 1 teaspoon granulated sugar (optional) over the onions to accelerate caramelization and enhance flavor. Continue cooking for 45 minutes to 1 hour, stirring every few minutes.
- Adjust heat and moisture: Lower the heat to maintain a gentle simmer to prevent burning. Add small amounts of water occasionally if the onions begin to dry out. Continue cooking until the onions are a rich brown color, then remove from heat and set aside.
- Boil the pasta: While the onions near completion, bring a large pot of water to a rolling boil. Add about 2 teaspoons of salt to the water for seasoning, then add 12 ounces of your preferred pasta and cook for 8–10 minutes or until al dente according to package instructions.
- Drain and reserve pasta water: Drain the pasta, reserving about 2 cups of the cooking liquid for finishing the sauce.
- Combine pasta and onions: Add the drained pasta to the pan with the caramelized onions. Pour in 1 cup of the reserved pasta cooking liquid, and stir in 1/2 to 1 cup of shredded parmesan cheese. Allow the cheese to melt and the sauce to thicken slightly.
- Adjust consistency and season: If the pasta mixture is too thick, add additional reserved pasta water as needed. Stir in 2–3 tablespoons of chopped fresh parsley and season with fresh ground black pepper to taste.
- Serve: Serve the caramelized onion pasta immediately for the best texture and flavor. Leftovers can be stored in the refrigerator for up to 3 days.
Notes
- Using granulated sugar helps speed up the caramelization but can be omitted if preferred.
- If the onions start sticking or drying out, add small splashes of water to prevent burning.
- This dish pairs well with a crisp green salad or roasted vegetables for a complete meal.
- You can use any pasta shape, but long noodles like spaghetti or fettuccine are especially good with this sauce.
- Use non-dairy parmesan for a vegan-friendly meal.
- Leftovers reheat well on the stovetop or in the microwave with a splash of water to loosen the sauce.
