Place velouté in a saucepan and simmer over moderate heat until reduced by about one-fourth. Stir occasionally.
Pour the cream into a stainless-steel bowl and temper it by slowly stirring in a little of the hot sauce. Stir this mixture slowly back into the sauce in the pan and return the sauce just to a simmer.
Swirl in raw butter pieces. Season to ta
Per 1 fl oz (29.57 mL): Calories, 50; Protein, 1 g; Fat, 5 g (79% cal.); Cholesterol, 20 mg; Carbohydrates, 2 g; Fiber, 0 g; Sodium, 30 mg.