tempering

The classic, creamy, egg-based concoction known as Hollandaise sauce is flavored with butter and a bit of lemon. Hollandaise means Holland-style or "coming from Holland" but like many rich and butter-laden sauces, it is entirely a French creation. In the 19th century it was called Sauce Isigny, after a town in Normandy famed for its creamy, golden butter to this day. During...