French Onion Mac and Cheese: Pressure Cooker Comfort Recipe
This French Onion Mac and Cheese recipe features deeply caramelized sweet onions combined with creamy gruyere and parmesan cheeses, all perfectly cooked together in a pressure cooker. The result is a rich, comforting, and indulgent macaroni and cheese dish enhanced with nutmeg and topped with crispy seasoned bread crumbs for texture and fresh thyme for a herby finish.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 4 servings
- Category: Main Course
- Method: Instant Pot
- Cuisine: French-American
Ingredients
Main Ingredients
- 3 tablespoons olive oil for caramelizing
- 4 large sweet onions, thinly sliced
- Kosher salt and pepper to taste
- 1 pound short cut pasta, already cooked
- 3 tablespoons unsalted butter
- 0.25 cup all-purpose flour
- 2.5 cups milk
- 0.25 teaspoon freshly ground nutmeg
- 12 ounces gruyere cheese, freshly grated
- 4 ounces parmesan cheese, freshly grated
- 0.33 cup seasoned bread crumbs for topping
- Fresh thyme to serve
Instructions
- Caramelize Onions: Heat olive oil in the pressure cooker on medium heat. Add the thinly sliced sweet onions along with a pinch of kosher salt. Stir frequently and cook the onions until they are golden brown and soft, which should take about 25 to 30 minutes. This slow cooking develops the rich flavor essential to the dish.
- Prepare Roux: Remove the caramelized onions and set them aside. Clean the pressure cooker pot if necessary, preserving the residual flavors. Then add the butter and melt it over medium heat. Stir in the all-purpose flour and whisk continuously for 1 to 2 minutes until the mixture turns lightly golden, creating a roux base for the cheese sauce.
- Make Cheese Sauce: Slowly pour in the milk while whisking constantly to prevent lumps. Continue to cook and stir the sauce until it thickens, about 5 to 7 minutes. Stir in the freshly ground nutmeg, grated gruyere, and parmesan cheeses until melted, smooth, and creamy.
- Combine Pasta and Onions: Mix in the caramelized onions and the cooked pasta into the cheese sauce. Season with salt and freshly ground black pepper to taste, ensuring that all components are evenly incorporated.
- Pressure Cook to Meld Flavors: Close the lid of the pressure cooker and set to cook under low pressure briefly—just long enough to meld the flavors together, about 3 to 5 minutes. Allow the cooker to release pressure naturally before opening.
- Serve: Spoon the French Onion Mac and Cheese into serving dishes and sprinkle with the seasoned bread crumbs and fresh thyme for a delightful crunchy topping and a fresh herbal note. Serve immediately while hot and creamy.
Notes
- For a deeper onion flavor, try roasting the onions before caramelizing them.
- Add a splash of white wine while cooking the onions to enhance the flavor complexity.
- Store leftover mac and cheese in the refrigerator for up to 4 days or freeze for up to 2 months.
- Reheat leftovers with a splash of milk to restore creaminess and prevent drying out.
