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Close up french onion mac and cheese.

French Onion Mac and Cheese

This French Onion Mac and Cheese recipe is a perfect mashup of two comforting classics – mac and cheese and classic french onion soup. So imagine sweet, tender caramelized onions mixed into a gruyere cheese sauce and topped with buttery thyme breadcrumbs. 
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Prep Time: 1 hour 30 minutes
Cook Time: 20 minutes
Total Time: 1 hour 50 minutes
Servings: 4 servings

Ingredients

  • 1 lb pasta
  • 2 tbsp olive oil
  • 2 large yellow onions sliced
  • 4 cloves garlic chopped
  • 1 teaspoon worcestershire
  • ½ teaspoon kosher salt
  • 4 tablespoon unsalted butter
  • 4 tablespoon all purpose flour
  • 3 cups whole milk
  • 1 cup heavy cream
  • 2.5 cups white cheddar cheese shredded
  • 2.5 cups gruyere cheese shredded
  • 1 teaspoon kosher salt

Breadcrumb topping

  • ½ cup panko breadcrumbs
  • 3 tablespoon melted unsalted butter
  • 1 teaspoon fresh thyme

Instructions

  • Preheat the oven to 425°F.
  • Cook your pasta, drain, and set aside.
  • In a large oven proof skillet or dutch oven warm olive oil over medium low heat, then add the onions and cook them until caramelized and deep golden brown – about an hour – stirring occasionally.
  • To the onions add the garlic, worcestershire, and a pinch of salt. Cook for 2 minutes then remove to a bowl and set aside.
  • Add the butter to the same skillet. Once melted add the flour and mix together until dissolved, about 1 minute.
  • Add the milk and heavy cream, bring to a simmer over medium heat and cook until thickened slightly, about 5 minutes.
  • Take it off the heat and stir in the cheese until melted, followed by the caramelized onions.
  • Add the cooked pasta to the cheese sauce and stir to combine.
  • In a small bowl combine melted butter, breadcrumbs and thyme. 
  • Sprinkle the breadcrumbs over the top of the mac and cheese in an even layer.
  • Bake until bubbly and golden brown on top, about 15-20 minutes.

Video

Nutrition Estimate

Calories: 1684kcal | Carbohydrates: 115g | Protein: 66g | Fat: 107g | Saturated Fat: 60g | Polyunsaturated Fat: 6g | Monounsaturated Fat: 31g | Trans Fat: 1g | Cholesterol: 303mg | Sodium: 2096mg | Potassium: 841mg | Fiber: 5g | Sugar: 17g | Vitamin A: 3299IU | Vitamin C: 6mg | Calcium: 1664mg | Iron: 3mg
Course: Dinner
Cuisine: American
Keyword: Caramelized Onion, French Onion, Mac and Cheese
Author: Haley