Sauce a la poulette (or domestic allemande sauce) is worthy of distinction among ordinary white sauces. Its chief points are:— first, that it is finished with the raw yolks of eggs, and secondly, that it is garnished with button mushrooms. It is a creamy-looking sauce the colour of a rich custard. Make an ordinary thin sauce blonde with one pint of chicken broth, one ounce of butter, one ounce of flour, and pepper and salt seasoning: stir well for a quarter of an hour, and it will be a thin white sauce: then add en bain-marie one by one the strained and well-beaten yolks of two eggs, finishing off with a pat of butter and a couple of tablespoonfuls of chopped button mushrooms, which have been separately stewed in milk. Some of the milk should be added with them. (See Mushrooms, Chapter XVI.)