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Creamy French onion pasta with caramelized onions and thyme in a beige bowl

French Onion Pasta

Charlotte
A rich, cozy, and creamy French Onion Pasta made with deeply caramelized onions, herbs, broth, cream, and melted cheese. It’s comforting, flavorful, and perfect for weeknight dinners or special occasions.
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Prep Time 10 minutes
Cook Time 40 minutes
Total Time 50 minutes
Course Dinner
Cuisine American
Servings 4 Servings
Calories 620 kcal

Ingredients
  

Caramelized Onions

Sauce

Pasta

  • 12 oz pasta rigatoni, penne, or fettuccine
  • ½ cup reserved pasta water as needed

Instructions
 

  • Caramelize the Onions:
  • Heat butter and olive oil in a large skillet over medium-low heat. Add sliced onions and salt. Cook slowly for 25–40 minutes, stirring often, until the onions are deep golden brown. Add garlic and cook for 1 more minute.
  • Deglaze the Pan:
  • Pour in the broth. Scrape the browned bits off the bottom of the pan. Let it simmer for 2–3 minutes.
  • Build the Sauce:
  • Add beef broth, thyme, and heavy cream. Stir in Gruyère (or mozzarella) and parmesan until melted and smooth. Simmer for 5–7 minutes.
  • Cook the Pasta:
  • Meanwhile, cook pasta in salted water until al dente. Reserve ½ cup pasta water before draining.
  • Combine Pasta & Sauce:
  • Add the cooked pasta to the onion sauce and toss to coat. Add splashes of pasta water as needed to loosen the sauce.
  • Season & Serve:
  • Taste and season with salt and pepper. Garnish with extra parmesan and thyme before serving.

Notes

  • For extra depth, caramelize onions low and slow—don’t rush.
  • Gruyère gives the most authentic “French onion soup” flavor.
  • Add mushrooms, spinach, chicken, or steak for variations.
  • Leftovers thicken in the fridge; loosen with broth or milk when reheating.

Nutrition

Calories: 620kcalCarbohydrates: 58gProtein: 20gFat: 34g
Keyword French Onion Pasta
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