Ingredients

  • 4 tablespoons unsalted butter, plus more, melted, for the dish
  • 1 cup finely grated Parmesan cheese, plus more for dusting
  • 1 large shallot, finely chopped
  • 6 tablespoons all-purpose flour
  • 1 1/2 cups milk
  • 2 tablespoons chopped fresh rosemary
  • 2 tablespoons chopped fresh thyme
  • Generous pinch of freshly grated nutmeg
  • Pinch of cayenne pepper
  • 1 cup grated Gruyere cheese
  • Coarse salt and freshly ground pepper
  • 6 large egg yolks plus 8 large egg whites, room temperature
  • Pinch of cream of tartar (if not using a copper bowl)

Method

  • Preheat the oven to 400F, with a rack in the middle.
  • Brush the outer lip of a 2-quart souffle dish with melted butter.
  • Tie a sheet of parchment around the dish with kitchen twine so it extends 3 inches above the rim.
  • Brush the inside of both the dish and the collar with melted butter.
  • Dust with Parmesan cheese; tap out excess.
  • Chill the dish in the freezer 15 minutes.
  • Heat the butter in a medium saucepan over medium heat.
  • Add the shallot; cook until soft, 3 to 4 minutes.
  • Add the flour; cook, whisking, 3 minutes.
  • Whisk in the milk, herbs, and spices.
  • Bring to a boil.
  • Reduce heat to low; whisk until thick, about 4 minutes.
  • Add the cheeses; whisk until melted.
  • Season with 1 teaspoon salt and pepper to taste.
  • Pour into a bowl; stir in the yolks.
  • Using a balloon whisk, beat the whites and a pinch of salt in a copper bowl to stiff peaks.
  • (Or beat with an electric mixer in a stainless-steel bowl with cream of tartar.)
  • Spoon one-third of the whites onto the base.
  • Fold them in: Cut through the center of the mixture with a large rubber spatula; gently turn the spatula over.
  • Rotate the bowl a quarter-turn; continue folding in the whites and turning the bowl until mostly combined.
  • Fold in the remaining whites, one-third at a time.
  • Pour the mixture into the prepared dish.
  • Bake 15 minutes.
  • Reduce temperature to 375F; bake until set, 16 to 18 minutes.
  • Remove the collar, and serve immediately