Start by heating the milk in a saucepan until small bubbles start to appear.
1 cup Whole milk
In a separate saucepan, melt the butter and add the flour, stirring until well blended to make a roux.
2 tablespoons Unsalted butter, 2 tablespoons All-purpose flour
Gradually stir in the hot milk and cook over medium heat until the sauce thickens.
Simmer the sauce over low heat for 5 minutes.
Now, stir in the cream and wine (if using).
1/2 cup Heavy cream, 2 tablespoons White wine
Season the sauce with salt, pepper, and nutmeg to taste.
1/2 teaspoon Kosher salt, 1/4 teaspoon White pepper, 1 pinch Freshly grated nutmeg