The Book of Household Management by Mrs. Beeton

of pounded sugar, 1 teaspoonful of salt, 1/2 teaspoonful of pepper, 2 teaspoonfuls of made mustard; vinegar. _Mode_.--Grate the horseradish, and mix it well with the sugar, salt, pepper, and mustard; moisten it with sufficient vinegar to give it the consistency of cream, and serve in a tureen: 3 or 4 tablespoonfuls of cream added to the above, very much improve the appearance and flavour of this sauce. To heat it to serve with hot roast beef, put it in a bain marie or a jar, which place in a saucepan of boiling water; make it hot, but do not allow it to boil, or it will curdle. _Note_.--This sauce is a great improvement on the old-fashioned way of serving cold-scraped horseradish with hot roast beef. The mixing of the cold vinegar with the warm gravy cools and spoils everything on the plate. Of course, with cold meat, the sauce should be served cold. [Illustration: THE HORSERADISH.] THE HORSERADISH.--This has been, for many years, a favourite accompaniment of roast beef, and is a native of England. It grows wild in wet ground, but has long been cultivated in the garden, and is, occasionally, used in winter salads and in sauces. On account of the great volatility of its oil, it should never be preserved by drying, but should be kept moist by being buried in sand. So rapidly does its volatile oil evaporate, that even when scraped for the table, it almost immediately spoils by exposure to the air. HORSERADISH VINEGAR.