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Creamy Caramelized Onion Pasta: Your Ultimate Comfort Dish

A close-up of creamy caramelized onion pasta, topped generously with dark caramelized onions and fresh parsley.
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Make this rich, creamy caramelized onion pasta for a weeknight dinner that feels gourmet. Slow-cooked sweet onions create a deep, savory flavor in a silky sauce.

Ingredients

Scale
  • 1 pound pasta (spaghetti or penne recommended)
  • 3 large yellow onions, thinly sliced
  • 3 tablespoons olive oil
  • 2 tablespoons butter (or vegan butter for dairy-free)
  • 4 cloves garlic, minced
  • 1/2 cup dry white wine (optional, for deglazing)
  • 2 cups vegetable broth
  • 1 cup heavy cream (or cashew cream for vegan option)
  • 1/2 cup grated Parmesan cheese (or nutritional yeast for vegan option)
  • 1 teaspoon dried thyme
  • Salt and black pepper to taste
  • Fresh parsley, chopped (for garnish)

Instructions

  1. Place the sliced onions and olive oil in a large, heavy-bottomed pot or Dutch oven over medium-low heat. Stir to coat the onions.
  2. Cook the onions slowly for 30 to 45 minutes, stirring every 5 to 7 minutes. You want the onions to become deep brown and sweet, not burnt. Reduce heat if they start browning too quickly.
  3. Once the onions are deeply caramelized, add the butter and minced garlic. Cook for 1 minute until fragrant.
  4. If using wine, pour it in and scrape up any browned bits from the bottom of the pot. Let the wine reduce by half (about 2 minutes).
  5. Add the vegetable broth and dried thyme. Bring the mixture to a simmer and cook for 5 minutes, allowing the flavors to meld.
  6. While the onions simmer, cook your pasta according to package directions until al dente. Reserve 1 cup of the starchy pasta water before draining.
  7. Reduce the heat under the onion mixture to low. Stir in the heavy cream and Parmesan cheese (or nutritional yeast). Stir constantly until the sauce is smooth and heated through. Do not boil.
  8. Add the drained pasta directly to the sauce. Toss to coat everything evenly. If the sauce seems too thick, add the reserved pasta water, a splash at a time, until you reach a rich, velvety consistency.
  9. Taste and adjust seasoning with salt and pepper.
  10. Serve immediately, garnished with fresh parsley. This is your ultimate onion pasta dish.

Notes

  • To achieve the best flavor for this rich pasta sauce, be patient with the onions; the slow cooking process is key to developing natural sweetness.
  • For a French onion pasta variation, add 1/2 cup of shredded Gruyère cheese along with the Parmesan in step 6.
  • If you are making the dairy-free caramelized onion pasta, ensure your cashew cream is smooth before adding it to the sauce base.

Nutrition

Find it online: https://kingscook.com/caramelized-onion-pasta-recipe-creamy/