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French Onion Soup Pasta Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.4 from 13 reviews
  • Author: Sue
  • Prep Time: 20 minutes
  • Cook Time: 1 hour 5 minutes
  • Total Time: 1 hour 25 minutes
  • Yield: 4 servings
  • Category: Main Dish
  • Method: Baking
  • Cuisine: French-inspired

Description

A comforting and flavorful French Onion Soup Pasta that combines rich caramelized onions with a creamy béchamel sauce and cavatappi pasta, baked to golden perfection with a crunchy breadcrumb topping. This dish offers the classic flavors of French onion soup in a hearty, pasta-based casserole, perfect for a cozy meal.


Ingredients

Bread and Seasoning

  • 1/2 Baguette
  • 1 tbsp Olive Oil
  • 1 tsp Salt
  • 1 tsp Pepper
  • 2 tsp Oregano
  • 1 tbsp Garlic Powder
  • 1 tbsp Smoked Paprika Powder

Pasta

  • 300 g Cavatappi Macaroni

Onions and Sauce

  • 5 Onions, thinly sliced
  • 1/2 cup Beef Broth
  • 3 cups Heavy Cream
  • 1 cup Parmesan Cheese, grated
  • 1 tbsp Flour
  • 3 tbsp Water (for béchamel)
  • 1 tsp Sugar
  • 2 tsp Salt
  • 1/2 tsp Nutmeg
  • Fresh Parsley, chopped


Instructions

  1. Slice the Onions: Thinly slice the onions into long strips to prepare for caramelization.
  2. Caramelize the Onions: Heat olive oil in a large skillet over medium heat. Add the sliced onions and sauté for 30–40 minutes, stirring occasionally to slowly caramelize them without burning. Optional: add 1 teaspoon of sugar to speed up caramelization.
  3. Add Broth and Simmer: If onions start sticking, add beef broth and let it simmer for 10 minutes. Once caramelized, remove onions from heat and set aside.
  4. Make the Béchamel Sauce: In the same skillet, melt butter over low-medium heat. Whisk in the flour and cook for 1 minute. Gradually add heavy cream while whisking to avoid lumps. Use ice-cold water if lumps form to smooth the sauce. Let the sauce thicken.
  5. Add Onions and Season Sauce: Stir in about two-thirds of the caramelized onions into the béchamel. Season with salt, pepper, chopped parsley, nutmeg, and 1 cup grated Parmesan cheese. Simmer gently.
  6. Cook the Pasta: Bring a large pot of salted water to a boil. Cook cavatappi pasta until just shy of al dente, as it will finish cooking in the oven.
  7. Combine Pasta and Sauce: Drain the pasta and mix it thoroughly with the béchamel and onion sauce.
  8. Prepare for Baking: Transfer the pasta mixture to a baking dish. Top with the remaining caramelized onions and homemade breadcrumbs (prepared from the baguette, seasoned with salt, pepper, oregano, garlic powder, and smoked paprika).
  9. Bake: Preheat the oven to 350°F (175°C). Bake the dish uncovered for 10–15 minutes until the top is golden brown and crisp.
  10. Serve: Remove from oven, serve immediately, and enjoy your comforting French Onion Soup Pasta.

Notes

  • Caramelize onions slowly and patiently for the best flavor.
  • Use beef broth for authentic richness but vegetable broth can be substituted for a lighter taste.
  • If béchamel sauce thickens too much, whisk in a little more cold water or cream to loosen.
  • Cook pasta slightly less than al dente so it finishes cooking in the oven without becoming mushy.
  • Homemade breadcrumbs add a delightful crunchy topping; toast the baguette with seasonings before baking.
  • Fresh parsley adds a nice fresh contrast to the creamy sauce.
  • This dish can be adapted to be vegetarian by substituting vegetable broth instead of beef broth.