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French Onion Soup Pasta

Creamy French onion soup pasta in a skillet topped with fresh parsley and melted Gruyere cheese
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This French Onion Soup Pasta combines all the rich, caramelized flavor of classic French onion soup with tender pasta in a creamy, cheesy Gruyere sauce. A comforting one-pan meal ready in about 50 minutes.

Ingredients

Scale
  • 2 tablespoons butter
  • 2 large onions, thinly sliced
  • 1 teaspoon sugar
  • 1/2 teaspoon salt
  • 2 cloves garlic, minced
  • 1/2 cup dry white wine (optional)
  • 4 cups beef broth (low-sodium recommended)
  • 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried)
  • 8 ounces fettuccine or other wide pasta
  • 1/2 cup heavy cream
  • 1 cup Gruyere cheese, freshly shredded
  • 1/2 cup Parmesan cheese, grated
  • Fresh parsley, chopped (for garnish)

Instructions

  1. Melt butter in a large skillet or Dutch oven over medium-low heat. Add onions, sugar, and salt. Cook slowly, stirring every few minutes, for 20 to 25 minutes until onions are deeply golden brown and jam-like in texture.
  2. Add garlic and cook for 1 minute until fragrant. Watch carefully as garlic burns quickly.
  3. If using, pour in the white wine to deglaze the pan, scraping up browned bits from the bottom. Simmer for 2 to 3 minutes until mostly evaporated.
  4. Add beef broth and thyme. Bring to a boil over medium-high heat, then add the dry pasta directly into the pan.
  5. Reduce heat to a steady simmer and cook for 10 to 12 minutes, stirring occasionally, until the pasta is al dente and most of the liquid has been absorbed. Add a splash of broth if it looks too dry before pasta is cooked through.
  6. Reduce heat to low. Stir in the heavy cream, Gruyere, and Parmesan for 1 to 2 minutes until the sauce is silky and fully melted. Do not boil after adding cream.
  7. Season with salt and pepper to taste. Serve immediately, garnished with fresh parsley.

Notes

  • Do not rush the caramelizing step. Low and slow heat over 20 to 25 minutes builds the deep, sweet flavor base the whole dish depends on.
  • Always shred Gruyere fresh from the block. Pre-shredded cheese contains anti-caking agents that can make the sauce grainy.
  • If the pasta becomes too thick, stir in additional beef broth or cream a tablespoon at a time over low heat.
  • For a broiled topping, transfer to an oven-safe dish, top with extra Gruyere and breadcrumbs, and broil for 1 to 2 minutes until golden.
  • Substitute white wine with extra beef broth plus a splash of Worcestershire sauce for a non-alcoholic version.

Nutrition

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