If we may be allowed the expression, “old new” potatoes should be thrown into neither boiling water nor cold water, but lukewarm water. Again, in boiling potatoes, especially in the case of old ones, some little allowance must be made for the time of year. In winter, they require longer time, and we may here mention the fact that it is very important that potatoes, after they are dug, should not be left out of doors and exposed to a hard frost, as in this case a chemical change takes place in which the starch is converted into sugar.
When potatoes are boiled in their jackets sufficiently, which fact is generally tested by sticking a steel fork into them, they should be strained off, and allowed to get dry for a few minutes in the saucepan, which should be removed from the fire, as at times the potatoes are apt to stick and burn.
When large potatoes are peeled before they are boiled, we should endeavour to send them to table floury, and this is often said to be the test of a really good cook. After the water has been strained off from the potatoes, a dry cloth should be placed under the lid of the saucepan, and the lid should only be placed half on, i.e., it should not be fitted down tight. It is also as well to give the saucepan now and then a shake, but do not overdo the shaking and break them. About five or ten minutes is generally sufficient.
Potatoes, Steamed.—Potatoes can be steamed in their jackets, and it is a more economical method than peeling. It should be remembered, however, that steam is hotter than boiling water. If plain water is underneath and boils furiously, and the steam is well shut in, they will cook very quickly; but if, as is generally the case, something else is in the saucepan under the steamer, boiling gently, this does not apply. We refer to the ordinary steamer met with in private houses, and not to the ones used in the large hotels and restaurants.
Potatoes, Baked.—When potatoes are baked in the oven in their jackets the larger they are the better. The oven must not be too fierce, and ample time should be allowed. Baked potatoes require quite two hours. This only refers to those baked in their jackets. When potatoes are cut up and baked in a tin they require some kind of fat, which, of course, in vegetarian cookery must be either oil or butter.
Potatoes, Mashed.—What may be termed high-class mashed potatoes are made by mashing up ordinary boiled potatoes with a little milk previously boiled, a little butter, and passing the whole through a wire sieve, when a little cream, butter and salt is added.
In private houses mashed potatoes are generally made from the remains of cold boiled potatoes, or when the cook, in boiling the potatoes, has made a failure. Still, of course, potatoes are boiled often expressly for the purpose of being mashed. This is often the case where old potatoes have to be cut into all sorts of shapes and sizes in order to get rid of the black spots. As soon as the potatoes are boiled they are generally moistened in the saucepan with a little drop of milk. It is undoubtedly an improvement, and also entails very little extra trouble, to boil the milk first. There is a difference in flavour, which is very marked, between milk that has been boiled and raw milk. Suppose you have coffee for breakfast, add boiling milk to one cup and raw milk to another, and then see how great a difference there will be in the flavour of the two. A little butter should be added to mashed potatoes, but it is not really essential. Mashed potatoes can be served in the shape of a mould, that is, they can be shaped in a mould and then browned in the oven. If you serve mashed potatoes in an ordinary dish, and pile them up in the shape of a dome, the dish will look much prettier if you score it round with a fork and then place the dish in a fairly fierce even; the edges will brown, but be careful that they don’t get burnt black.
Potatoes, Fried.—The best lesson, if you wish to fry potatoes nicely, is to look in at the window of a fried fish shop, where every condition is fulfilled that is likely to lead to perfection. The bath of oil is deep and smoking hot, and in sufficient quantity not to lose greatly in temperature on the introduction of the frying-basket containing the potatoes. The potatoes must be cut up into small pieces, not much bigger in thickness than the little finger; these are plunged into the smoking hot oil, and as soon as they are slightly browned on the outside they are done. They acquire a darker colour after they are removed from the oil, and the inside will go on cooking for several minutes. It would be quite impossible to eat fried potatoes directly they are taken out of the fat, as they would burn the mouth terribly. It is best to throw the fried potatoes into a cloth for a few seconds.
Potato Chips.—Potato chips are ordinary fried potatoes cut up when raw into little pieces about the size and thickness of a lucifer match. They, of course, will cook very quickly. They should be removed from the oil directly they begin to turn colour.
Potato Ribbon.—Potato ribbon is simply ordinary fried potatoes, in which the raw potato is cut in the shape of a ribbon. You take a potato and peel it in the ordinary way. You then take this and, with not too sharp a knife, peel it like apple, making the strip as long as you can, like children sometimes do when they throw the apple peel over their shoulders to see what letter it will make. You can go on peeling the potato round and round till there is none left. These ribbons are thrown into boiling oil, and must be removed as soon as they begin to turn colour. When piled up in a dish they look very pretty, and with a little pepper and salt, and a squeeze of lemon-juice, make an excellent meal when eaten with bread.