Thanks goes to Julia Child for this recipe. I made a few revisions from the original recipe.
4 Tablespoons softened butter
2 Tablespoons grated Parmesan
3 Tablespoons flour
1 cup hot whole milk
pinch nutmeg
1/2 teaspoon sea salt
4 egg yolks
5 egg whites
1 cup coarsely grated cheese (Monteray Jack or a sharp white cheddar)
Preheat 400F. Butter an 8-cup souffle dish with 1 1/2 Tablespoons butter. Dust interior of dish with Parmesan and knock out excess. In large saucepan, melt the remaining butter over medium high heat. Stir in the flour and cook for 2 minutes, stirring constantly, until the butter and flour foam and froth. Remove from heat and beat in the hot milk, then simmer over medium heat and stir slowly until thick, about 1 to 2 minutes. Remove from heat and whisk in seasonings, then the egg yolks, 1 by 1. Whip the egg whites to stiff, shining peaks, then whisk 1/4 of them into the sauce to lighten it. Delicately fold the remaining egg whites into the sauce, alternating with the cheese. Turn the souffle mixture into the prepared dish and set in oven. Reduce heat to 375F and bake until souffle has puffed 1 to 2 inches above the rim and has browned on top, about 30 minutes. Serve immediately.