- LF
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These Carbs Don't Count
June 8, 2025
This French Onion Soup Mac & Cheese is the ultimate marriage of two comfort food classics. It starts with deeply caramelized onions, slow-cooked for rich flavor, then transitions into a creamy, savory cheese sauce made with a touch of beef broth, milk, and heavy cream. Blended with Gruyère, cheddar, and Swiss cheeses, the result is a luxurious, melty dish topped with broiled cheese for a golden finish. It’s cozy, decadent, and utterly irresistible.
$2.58 / Serving 
Estimated Price / Serving
22 Ingredients
MEDIUM
Instructions
1
|
Cook pasta in salted boiling water until al dente. Reserve 1/2 cup pasta water, then drain.
2
|
In a large skillet, melt 3 tbsp butter and 1 tbsp olive oil over medium heat. Add sliced onions, season with salt and pepper, and cook for 45–90 minutes, stirring frequently and adding water as needed to prevent burning, until deeply caramelized.
3
|
Remove caramelized onions and set aside.
4
|
In the same pan, add 3 tbsp butter and 1 tbsp olive oil. Add minced garlic and sauté until fragrant.
5
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Whisk in flour and cook the roux for 2–3 minutes.
6
|
Gradually add milk, whisking constantly to prevent lumps. Then add heavy cream and beef broth. Stir well to combine.
7
|
Season with garlic powder, onion powder, paprika, thyme, salt, and pepper.
8
|
Stir in Gruyère, cheddar, and Swiss cheese. Mix until smooth and fully melted.
9
|
Add caramelized onions back into the sauce. Stir in cooked pasta and a splash of reserved pasta water to reach desired consistency.
10
|
Top with extra shredded cheese and broil for 5–10 minutes until bubbly and golden brown.
11
|
Serve hot and enjoy!
49.59 g
Carbs
75.42 g
Fat
31.28 g
Protein
1206.14 kcal
Calories
Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
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