Preheat oven to 375 degrees Fahrenheit (190C). Place a baking sheet on the middle rack in the oven. Butter 4 ramekins of 8-9 oz. (230-250ml) capacity and coat the bottom and sides with grated Parmesan. Discard any excess.
Separate whites from yolks and set aside until ready to use.
In a medium saucepan, melt the butter over medium-low heat. Add the flour and stir until smooth, and cook for about 1-2 minutes, until bubbling. Gradually stir in milk, until mixture is smooth. Bring to a boil, stirring constantly; cook and stir 2-3 minutes more or until thickened.⏱ 5 min
Mix Sauce With Cheese, Spices & Egg Yolks.