Melt butter in a small saucepan over medium-low heat; whisk in flour, and cook, whisking constantly, 5 minutes. Stir in cream and sugar; cook, whisking constantly, 3 minutes or until thickened. Stir in bourbon, vanilla, and nutmeg; cook, whisking constantly, 5 minutes or until thoroughly heated.
Dooky Chase's Restaurant, New Orleans, Louisiana