2 tablespoons butter
2 tablespoons flour
1 cup milk
¹⁄₄ teaspoon salt
Few grains of white pepper
Melt the butter over moderate heat, add the flour, and blend the two
thoroughly. Heat the milk over hot water, add it, one-third at a time,
to the butter and flour, stirring constantly and allowing the mixture to
become perfectly smooth and glossy before adding more milk. Season it
and allow it to come to the boiling point. If it is not to be served
immediately, cover it and slip it into the cooker to keep hot.