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Creamy Caramelized Onion Pasta with Chili Oil Drizzle

Close-up of spaghetti tossed in sauce, topped with rich caramelized onion pasta and fresh parsley.
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This recipe delivers the deep, sweet flavor of slow-cooked onions combined with a kick of chili oil for a satisfying weeknight dinner. It is a comforting pasta dish ready quickly.

Ingredients

Scale
  • 1 pound pasta (linguine or spaghetti recommended)
  • 3 large yellow onions, thinly sliced
  • 4 tablespoons unsalted butter or olive oil
  • 1 teaspoon salt, plus more for pasta water
  • 1/2 teaspoon black pepper
  • 1/4 cup dry white wine or vegetable broth
  • 1 cup heavy cream (or full-fat coconut milk for vegan option)
  • 1/2 cup grated Parmesan cheese (or nutritional yeast for vegan option)
  • 1 teaspoon garlic powder
  • 1/2 teaspoon dried thyme
  • 2 tablespoons chili oil (or more, to taste)
  • Fresh parsley, chopped, for garnish

Instructions

  1. Place the sliced onions in a large, heavy-bottomed skillet. Add the butter or olive oil, salt, and pepper. Cook over medium-low heat, stirring occasionally, for 25 to 35 minutes until the onions are deep golden brown and sweet. Do not rush this step; this creates the rich flavor base.
  2. While the onions caramelize, bring a large pot of salted water to a boil. Cook the pasta according to package directions until al dente. Reserve 1 cup of the starchy pasta water before draining.
  3. Once the onions are deeply caramelized, pour in the white wine or broth to deglaze the pan, scraping up any browned bits from the bottom. Cook for 2 minutes until the liquid reduces slightly.
  4. Reduce the heat to low. Stir in the heavy cream, Parmesan cheese (or nutritional yeast), garlic powder, and thyme. Heat gently until the sauce is smooth and warmed through; do not boil.
  5. Add the drained pasta directly to the skillet with the sauce. Toss to coat. Add reserved pasta water, a few tablespoons at a time, until the sauce reaches your desired creamy consistency.
  6. Divide the pasta among serving bowls. Drizzle each serving generously with chili oil and garnish with fresh parsley.

Notes

  • To achieve the best caramelized onion flavor quickly, use a wide skillet to allow the onions to cook in a single layer initially.
  • For a vegan caramelized onion pasta, substitute butter with olive oil and use full-fat coconut milk and nutritional yeast for the creamy sauce base.
  • This recipe works well as a French onion pasta viral recipe variation; add a splash of balsamic vinegar near the end for extra depth.

Nutrition

Find it online: https://cookingzenith.com/caramelized-onion-pasta-chili-oil-drizzle/