Pressure Cooker French Onion Mac and Cheese Recipe
This ultra-creamy Pressure Cooker French Onion Mac and Cheese balances deeply caramelized onions with a luxurious Gruyere-Parmesan cheese sauce—all in one pot. Pure comfort food made fast!
Equipment
- 1 Pressure Cooker for mac and cheese
Ingredients
Main ingredients
- 3 tablespoons olive oil for caramelizing
- 4 sweet onions large, thinly sliced
- Kosher salt and pepper to taste
- 1 pound short cut pasta cooked ahead
- 3 tablespoons unsalted butter
- ¼ cup all-purpose flour
- 2 ½ cups milk
- ¼ teaspoon freshly ground nutmeg
- 12 ounces Gruyere cheese freshly grated
- 4 ounces Parmesan cheese freshly grated
- ⅓ cup seasoned bread crumbs
- fresh thyme for serving
Instructions
Instructions
- Heat olive oil in a large skillet over medium heat. Add sliced onions, salt and pepper. Cook, stirring occasionally, until deep golden and caramelized, about 25 minutes. Set aside.
- In a large saucepan over medium heat, melt butter. Whisk in flour and cook until golden, about 1–2 minutes.
- Gradually whisk in milk. Add nutmeg, salt and pepper. Simmer and cook until thickened, about 5–7 minutes.
- Lower heat and stir in Gruyere and Parmesan until smooth and melted.
- Add cooked pasta and caramelized onions to cheese sauce. Stir gently to coat.
- Transfer mixture to pressure cooker if not already there. Seal lid and cook on high pressure for 3 minutes. Quick release. Top with breadcrumbs and fresh thyme. Broil for crunchy top if desired.
Notes
For a deeper flavor, caramelize onions low and slow. Broiling is optional but adds texture. Reheat gently with milk to maintain creaminess.