Caramelized Onion Pasta with Chili Oil Recipe
Caramelized Onion Pasta with Chili Oil is a comforting and flavorful dish that combines the sweet richness of slow-cooked caramelized onions with the bold heat of homemade chili oil. This pasta features tender noodles coated in savory, aromatic onions and a smoky, spicy chili oil, finished with a sprinkle of Parmesan cheese and fresh herbs for a perfect balance of sweet, spicy, and savory flavors. Ideal for a cozy weeknight dinner or a meal with friends, this recipe is simple yet impressive, with options to customize according to your dietary preferences.
- Prep Time: 10 minutes
- Cook Time: 35 minutes
- Total Time: 45 minutes
- Yield: 4 servings 1x
- Category: Lunch
- Method: Stovetop
- Cuisine: Italian-inspired
- Diet: Vegetarian
Ingredients
Scale
For the Pasta:
- 12 oz pasta (spaghetti, penne, linguine, or preferred shape)
- 2 tablespoons olive oil
- 1 large yellow onion, thinly sliced
- 3 cloves garlic, minced
- Salt and pepper, to taste
For the Chili Oil:
- 3 tablespoons olive oil (extra virgin preferred)
- 1 tablespoon red chili flakes (adjust to spice preference)
- 1 teaspoon paprika
- 1 small garlic clove, thinly sliced
- 1 teaspoon soy sauce
For Garnishing:
- Grated Parmesan cheese
- Fresh basil or parsley, chopped
- Extra chili flakes (optional)
Instructions
- Caramelize the Onions: Thinly slice the onion into even rings for uniform cooking. Heat 2 tablespoons of olive oil in a large deep skillet or saucepan over medium heat. Add the onions with a pinch of salt to help draw out moisture. Cook slowly, stirring every 5-7 minutes to ensure even caramelization without burning, for about 25-30 minutes until golden and soft. About 5 minutes before completion, add minced garlic and cook until fragrant, stirring frequently to prevent burning. Season with salt and freshly ground black pepper, then set aside.
- Make the Chili Oil: In a small saucepan, heat 3 tablespoons olive oil over medium heat. Add thinly sliced garlic and sauté for 1-2 minutes until fragrant but not browned. Stir in red chili flakes and paprika, cooking for 2-3 minutes to infuse the oil with smoky and spicy flavors. Add 1 teaspoon soy sauce for umami, stir well, and simmer for 2 more minutes. Remove from heat and set aside once aromatic.
- Cook the Pasta: While onions are caramelizing, bring a large pot of salted water to a boil. Cook pasta according to package instructions until al dente. Reserve 1 cup of pasta water before draining. Set cooked pasta aside.
- Combine Pasta and Onions: Add caramelized onions to the pasta and toss to combine thoroughly. Drizzle the prepared chili oil over the pasta and toss again to coat evenly, allowing the heat of the pasta to meld with the oil. If the mixture feels dry, gradually add reserved pasta water until the sauce reaches a smooth, glossy consistency.
- Garnish and Serve: Sprinkle generously with grated Parmesan cheese and freshly chopped basil or parsley. Add extra chili flakes if additional heat is desired. Serve the pasta hot immediately as a satisfying main dish, or pair with protein or salad for a complete meal.
Notes
- Be patient when caramelizing onions; low and slow cooking develops the best sweetness and flavor.
- Use high-quality extra virgin olive oil for both the chili oil and onion cooking to enhance flavor.
- Reserving pasta water is key to creating a silky sauce that clings well to noodles.
- Adjust chili flakes in the oil to control the heat level; add a little olive oil if too spicy.
- To make vegan, omit Parmesan or use a plant-based alternative.
- Add sautéed vegetables or proteins like grilled chicken, shrimp, or tofu to customize the dish.
Keywords: caramelized onion pasta, chili oil pasta, spicy pasta recipe, vegetarian Italian pasta, easy weeknight dinner, sweet and spicy pasta
