French Onion Mac & Cheese
French Onion Mac & Cheese has a rich, cheesy sauce of classic mac and cheese and a flavor boost of sweet, caramelized onions, reminiscent of French onion soup.
Prep Time10 minutes mins
Cook Time30 minutes mins
Total Time40 minutes mins
Course: Main Course, Side Dish
Cuisine: American
Keyword: Cheese, Onion, Pasta
Servings: 4 Servings
Calories: 733kcal
- 5 tablespoons butter divided
- 1 medium yellow onion thinly sliced
- 1 clove garlic minced
- 1/4 teaspoon salt
- 2 teaspoon fresh thyme leaves chopped
- 2 tablespoons dry sherry or white wine
- 2 tablespoons beef stock
- 1 teaspoon Worcestershire sauce
- 8 ounces uncooked pasta shells
- 1 1/2 cups whole milk
- 1/4 cup all-purpose flour
- 1 cup shredded sharp cheddar cheese
- 1 1/2 cups shredded gruyere or mozzarella
- 1/4 cup crispy onions
- OR
- 1 shallot sliced thinly and 2 tablespoons neutral cooking oil
In a skillet over low heat, add the onions and 1/4 cup of water. Cook until the water has evaporated, about 5 minutes. Add in 2 tablespoons butter, garlic, salt and thyme. Cook for about 15 minutes, until the onions are caramelized.
Bring a large pot of salted water to a boil. Add the pasta and cook for 1 minute less than the package instructs.
Turn up the heat on the onions to medium high. Add sherry or wine to the pan and cook for about 1 minute. Add the beef stock and Worcestershire sauce.
Add in the remaining butter. As it melts, add in the flour and whisk until combined. Cook for 1 minute, stirring constantly.
Slowly whisk in the milk, stirring constantly to avoid lumps. Cook for about 2-3 minutes, until slightly thickened.
Add in the cheddar and mozzarella. Stir until they are melted and the sauce is smooth.
Add the pasta directly from the pot, along with a little pasta water, if necessary to smooth out the sauce. Taste and season with salt to suit your preference.
Top with crispy onions or make your own.
For the crispy onions:
To make your own crispy onions, combine the shallots and cooking oil in a skillet over medium heat. Turn them over occasionally while cooking. Cook until they are a golden color, about 6-8 minutes. Drain on a paper-towel-lined plate.
- Don’t rush the caramelization process for the mac and cheese. Cooking them on low heat allows the natural sugars to develop and bring out a deep, sweet flavor.
- Use a combination of Mozzarella and sharp cheddar for the mac and cheese to get that perfect balance of creaminess and bold flavor.
- Save some of the pasta water to thin out the cheese sauce if it gets to thick.
- When making the crispy onions watch them as they start to get golden brown. They can go from perfect to burned in a minute.
Calories: 733kcal | Carbohydrates: 63g | Protein: 29g | Fat: 40g | Saturated Fat: 23g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 9g | Trans Fat: 1g | Cholesterol: 114mg | Sodium: 711mg | Potassium: 496mg | Fiber: 3g | Sugar: 11g | Vitamin A: 1252IU | Vitamin C: 6mg | Calcium: 600mg | Iron: 2mg