Gruyère Mac & Cheese Recipe

Ingredients

• 4 tablespoons (1/2 stick) unsalted butter, at room temperature
• 2 cups sliced mushrooms
• 1 teaspoon chopped thyme leaves
• Kosher salt and freshly ground black pepper
• 2 cups whole milk, plus more as needed
• 1/4 cup heavy cream or whole milk
• 6 ounces cream cheese, room temperature
• 2 cloves garlic, peeled (optional)
• 1/8 teaspoon cayenne pepper
• 1 pinch freshly grated nutmeg
• 8 ounces macaroni
• 1½ cups (6 ounces) shredded Gruyère cheese
• 1/2 cup (2 ounces) shredded fontina cheese
• 1/4 cup grated Parmesan cheese
• Chopped chives, for garnish