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Gruyere Mac and Cheese with Caramelized Onions

4.90 from 19 votes
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Ingredients

Instructions 

  • Preheat the oven to 375 degrees F. Grease an 8×8 inch baking dish.
  • In a large skillet, melt 2 tablespoons of the butter over medium-low heat. Add the onions with a pinch of salt and cook, stirring occasionally, until they are golden and caramely, about 40 minutes.
  • Bring a pot of salted water to a boil and cook the pasta according to the directions, reducing the cook time by 1 minute. Drain and set aside.
  • In a large pot, melt the remaining 4 tablespoons butter over medium-high heat. Add the flour, whisking until combined to create a roux. Cook for 1 to 2 minutes until it’s golden and fragrant. Slowly pour in half the milk, whisking constantly so they mixture can thicken, about 5 minutes. Slowly pour in the other half of the milk and whisk until thickened. Reduce the heat to low and add the gruyere and swiss and all but 2 tablespoons of the parmesan. Stir with a large wooden spoon until the cheese melts. Stir in the paprika, cayenne, nutmeg, mustard and any salt and pepper to taste. Stir in the cooked pasta and the onions.
  • Transfer the mixture to a baking dish and top with the panko crumbs and remaining parmesan. Bake until the top is golden and crunchy, about 25 minutes. Cook for a few minutes before serving.

Notes

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