Dutch Sauce. No. 4. “Sauce Hollandaise.” (Mrs. Gordon. 1897.)
Put the yolks of 3 eggs into a bain-marie pan, place that in another pan in hot water on the stove, add 1 teaspoonful of tarragon vinegar, 1 teaspoonful of chilli vinegar, ½ a teaspoonful of sugar, a pinch of salt, adding gradually and alternately 2 ozs. of butter, 1 tablespoonful of white sauce (see below), and a teacupful of cream, whipping with a wire whisk all the time. The water in the pan must not boil, though just on the boiling point. It requires to cook about 20 minutes.
The white sauce mentioned is as follows: 1 oz. of butter, 1 dessertspoonful of flour, mixed with milk and cream into a smooth paste over the stove.