PRESERVES.
From the nature of vegetable substances, and chiefly from their not passing so rapidly into the putrescent state as animal bodies, the mode of preserving them is somewhat different, although the general principles are the same. All the means of preservation are put in practice occasionally for fruits and the various parts of vegetables, according to the nature of the species, the climate, the uses to which they are applied, &c. Some are dried, as nuts, raisins, sweet herbs, &c.; others are preserved by means of sugar, such as many fruits whose delicate juices would be lost by drying; some are preserved by means of vinegar, and chiefly used as condiments or pickles; a few also by salting, as French beans; while others are preserved in spirits. We have, however, in this place to treat of the best methods of preserving fruits. Fruit is a most important item in the economy of health; the epicurean can scarcely be said to have any luxuries without it; therefore, as it is so invaluable, when we cannot have it fresh, we must have it preserved. It has long been a desideratum to preserve fruits by some cheap method, yet by such as would keep them fit for the various culinary purposes, as making tarts and other similar dishes. The expense of preserving them with sugar is a serious objection; for, except the sugar be used in considerable quantities, the success is very uncertain. Sugar also overpowers and destroys the sub-acid taste so desirable in many fruits: those which are preserved in this manner are chiefly intended for the dessert. Fruits intended for preservation should be gathered in the morning, in dry weather, with, the morning sun upon them, if possible; they will then have their fullest flavour, and keep in good condition longer than when gathered at any other time. Until fruit can be used, it should be placed in the dairy, an ice-house, or a refrigerator. In an ice-house it will remain fresh and plump for several days. Fruit gathered in wet or foggy weather will soon be mildewed, and be of no service for preserves.
Having secured the first and most important contribution to the manufacture of preserves—the fruit, the next consideration is the preparation of the syrup in which the fruit is to be suspended; and this requires much care. In the confectioner’s art there is a great nicety in proportioning the degree of concentration of the syrup very exactly to each particular case; and he knows this by signs, and expresses it by certain technical terms. But to distinguish these properly requires very great attention and considerable experience. The principal thing to be acquainted with is the fact, that, in proportion as the syrup is longer boiled, its water will become evaporated, and its consistency will be thicker. Great care must be taken in the management of the fire, that the syrup does not boil over, and that the boiling is not carried to such an extent as to burn the sugar.
The first degree or consistency is called the thread, which is subdivided into the little and great thread. If you dip the finger into the syrup and apply it to the thumb, the tenacity of the syrup will, on separating the finger and thumb, afford a thread, which shortly breaks: this is the little thread. If the thread, from the greater tenacity, and, consequently, greater strength of the syrup, admits of a greater extension of the finger and thumb, it is called the great thread. There are half-a-dozen other terms and experiments for testing the various thickness of the boiling sugar towards the consistency called caramel; but that degree of sugar-boiling belongs to the confectioner. A solution of sugar prepared by dissolving two parts of double-refined sugar (the best sugar is the most economical for preserves) in one of water, and boiling this a little, affords a syrup of the right degree of strength, and which neither ferments nor crystallizes. This appears to be the degree called smooth by the confectioners, and is proper to be used for the purposes of preserves. The syrup employed should sometimes be clarified, which is done in the following manner:—Dissolve 2 lbs. of loaf sugar in a pint of water; add to this solution the white of an egg, and beat it well. Put the preserving-pan upon the fire with the solution; stir it with a wooden spatula, and when it begins to swell and boil up, throw in some cold water or a little oil to damp the boiling; for, as it rises suddenly, if it should boil over, it would take fire, being of a very inflammable nature. Let it boil up again; then take it off, and remove carefully the scum that has risen. Boil the solution again, throw in a little more cold water, remove the scum, and so on for three or four times successively; then strain it. It is considered to be sufficiently boiled when some taken up in a spoon pours out like oil.
Although sugar passes so easily into the state of fermentation, and is, in fact, the only substance capable of undergoing the vinous stage of that process, yet it will not ferment at all if the quantity be sufficient to constitute a very strong syrup: hence, syrups are used to preserve fruits and other vegetable substances from the changes they would undergo if left to themselves. Before sugar was in use, honey was employed to preserve many vegetable productions, though this substance has now given way to the juice of the sugar-cane.
The fruits that are the most fit for preservation in syrup are apricots, peaches, nectarines, apples, greengages, plums of all kinds, and pears. As an example, take some apricots not too ripe, make a small slit at the stem end, and push out the stone; simmer them in water till they are softened and about half done, and afterwards throw them into cold water. When they have cooled, take them out and drain them. Put the apricots into the preserving-pan with sufficient syrup to cover them; let them boil up three or four times, and then skim them; remove them from the fire, pour them into an earthen pan, and let them cool till next day. Boil them up three days successively, skimming each time, and they will then be finished and in a fit state to be put into pots for use. After each boiling, it is proper to examine into the state of the syrup when cold; if too thin, it will bear additional boiling; if too thick, it may be lowered with more syrup of the visual standard. The reason why the fruit is emptied out of the preserving-pan into an earthen pan is, that the acid of the fruit acts upon the copper, of which the preserving-pans are usually made. From this example the process of preserving fruits by syrup will be easily comprehended. The first object is to soften the fruit by blanching or boiling it in water, in order that the syrup by which it is preserved may penetrate through its substance.
Many fruits, when preserved by boiling, lose much of their peculiar and delicate flavour, as, for instance, pineapples; and this inconvenience may, in some instances, be remedied by preserving them without heat. Cut the fruit in slices about one-fifth of an inch thick, strew powdered loaf sugar an eighth of an inch thick on the bottom of a jar, and put the slices on it. Put more sugar on this, and then another layer of the slices, and so on till the jar is full. Place the jar with the fruit up to the neck in boiling water, and keep it there till the sugar is completely dissolved, which may take half-an-hour, removing the scum as it rises. Lastly, tie a wet bladder over the mouth of the jar, or cork and wax it.
Any of the fruits that have been preserved in syrup may be converted into dry preserves, by first draining them from the syrup, and then drying them in a stove or very moderate oven, adding to them a quantity of powdered loaf-sugar, which will gradually penetrate the fruit, while the fluid parts of the fruit gently evaporate. They should be dried in the stove or oven on a sieve, and turned every six or eight hours, fresh powdered sugar being sifted over them every time they are turned. Afterwards, they are to be kept in a dry situation, in drawers or boxes. Currants and cherries preserved whole in this manner, in bunches, are extremely elegant, and have a fine flavour. In this way it is, also, that orange and lemon chips are preserved.
Marmalades, jams, and fruit pastes are of the same nature, and are now in very general request. They are prepared without difficulty, by attending to a very few directions; they are somewhat expensive, but may be kept without spoiling for a considerable time. Marmalades and jams differ little from each other: they are preserves of a half-liquid consistency, made by boiling the pulp of fruits, and sometimes part of the rinds, with sugar. The appellation of marmalade is applied to those confitures which are composed of the firmer fruits, as pineapples or the rinds of oranges; whereas jams are made of the more juicy berries, such as strawberries, raspberries, currants, mulberries, &c. Fruit pastes are a kind of marmalades, consisting of the pulp of fruits, first evaporated to a proper consistency, and afterwards boiled with sugar. The mixture is then poured into a mould, or spread on sheets of tin, and subsequently dried in the oven or stove till it has acquired the state of a paste. From a sheet of this paste, strips may be cut and formed into any shape that may be desired, as knots, rings, &c. Jams require the same care and attention in the boiling as marmalade; the slightest degree of burning communicates a disagreeable empyreumatic taste, and if they are not boiled sufficiently, they will not keep. That they may keep, it is necessary not to be sparing of sugar.
In all the operations for preserve-making, when the preserving-pan is used, it should not be placed on the fire, but on a trivet, unless the jam be made on a hot plate, when this is not necessary. If the pan be placed close on to the fire, the preserve is very liable to burn, and the colour and flavour be consequently spoiled.
Fruit jellies are compounds of the juices of fruits combined with sugar, concentrated, by boiling, to such a consistency that the liquid, upon cooling, assumes the form of a tremulous jelly.
Before fruits are candied, they must first be boiled in syrup, after which they are taken out and dried on a stove, or before the fire; the syrup is then to be concentrated, or boiled to a candy height, and the fruit dipped in it, and again laid on the stove to dry and candy; they are then to be put into boxes, and kept dry.
Conserves consist of fresh vegetable matters beat into a uniform mass with refined sugar, and they are intended to preserve the virtues and properties of recent flowers, leaves, roots, peels, or fruits, unaltered, and as near as possible to what they were when fresh gathered, and to give them an agreeable taste.
The last to be mentioned, but not the least important preparation of fruit, is the compôte, which can be made at the moment of need, and with much less sugar than would be ordinarily put to preserves. Compôtes are very wholesome things, suitable to most stomachs which cannot accommodate themselves to raw fruit or a large portion of sugar. They are the happy medium—far better than ordinary stewed fruit.