Definitions While this file was to be included in the Cheesecakes From Around The World File, it answered so many questions from the echo that I decided to include it as a separate file. It will discuss the different things that go into cheese cakes and the equipment used to make them as well as the problems that most people run into when they make them. I hope that this will answer many of the questions the have arisen in many of the messages on the echo. <> Cheeses The most essential ingredient in any cheesecake is -- you guessed it -- Cheese. The cheeses that are most commonly used are cream cheese, Neufchatel, cottage cheese, and riccota, but there are some recipes that use such cheeses as gouda and Swiss. Cheese is made from milk, whether it be from cows, goats, or sheep. It has even been made from buffalo and reindeer milk. The milk is separated into curds (solids) and whey (liquids) and most of the cheeses are made from the curds, although riccota is made from the whey. The fresh or uncured cheeses are the ones you mostly will be using in your cheesecakes, and these include cream cheese, neufchatel and cottage cheese. Although these unripened cheeses all have roughly the same proportion of cheese solids (roughly 15 to 18 percent), they differ greatly in their butterfat content. All other things being equal, the higher the butterfat content, the creamier the cheesecake. CREAM CHEESE: Cream cheese, made from milk, must contain at least 33 percent butterfat and has one hundred calories per ounce. The water content is 50 percent, the texture is smooth and oft, the flavor delicate. Allow the cheese to come to room temperature before using it so that it will blend easily with other ingredients. Cream cheese is sold in three-ounce and eight-ounce packages in all supermarkets. Packages are usually dated so be sure to check for freshness when you purchase it. Once purchased, the cheese is usable for at least three weeks, sometimes even longer. The most widely distributed brand is Kraft's Philadelphia Brand Cream Cheese although store brands are also available. We've found that these store brands vary somewhat in quality; they aren't always as smooth and rich as we'd like. You may want to do some experimenting to see how well store brands available in your area compare in flavor and texture with the national brand. Imitation cream cheese is available in some places, but we don't recommend it for your cheesecakes. NEUFCHATEL: Neufchatel is made, in the United States, very similar to cream cheese. It is made from whole or skim milk, or a combination of milk and cream. Its butterfat content is a little lower -- about 25 percent -- and it usually has 70 calories per ounce. The water content is 60 percent; the texture is a little lighter than cream cheese. The flavor is milder, but in most cases it can be substituted for cream cheese when a lower fat content is desired. But then again, who do you think you're kidding? No matter how you slice it, cheesecake is fattening. If you do decide to adapt a cream-cheese recipe for use with neufchatel, remember that the water content is a little higher than cream cheese; you may want to increase slightly the quantity of one of the moisture-holding ingredients (such as flour, cornstarch, gelatin, or egg whites) called for in the recipe. Neufchatel is sold much as is cream cheese and the usable life is about the same. Do not confuse this with the French neufchatel, which is similar to a camembert. COTTAGE CHEESE A wide variety of cottage cheeses are available on the market ranging in butterfat content from 1/2 percent to 4 percent. The dry curd cottage cheeses have roughly twenty calories per ounce and those with 4 percent butterfat contain about thirty calories per ounce. The curds themselves are made from skim milk. The richer cottage cheeses, sometimes called creamed cottage cheese are made by adding the whole milk and cream to the curds. Unless otherwise noted, the recipes calling for the use of Cottage cheese mean the creamed cottage cheese (at least 2 percent butterfat) carefully drained of excess moisture. FARMER CHEESE: This is skim-milk cottage cheese that has been pressed into small squares or rectangles. It is usually sold in delicatessens or specialty shops as bricks. Dry-curd cottage cheese can be substituted for farmer cheese if necessary. RICOTTA: In the United States, ricotta is almost always made from whole milk or a combination of milk and whey. The fat content is from 4 to 10 percent and there are about 50 calories per ounce. The water content is about 72 percent; the texture is slightly grainy, ranging to creamier if made from all milk. It is sold in 15 or 32-oz containers which are usually dated. Be sure to check for freshness, since this cheese keeps only for a few days. Skim-milk ricotta is also available, and this resembles the original ricotta made in Italy. Most cheesecake recipes call for the whole milk ricotta. CREAM Many of the recipes call for cream, either sweet or sour. Usually the cream is added to lighten the cake or provide a richer flavor. SWEET CREAM: Cream comes in several different grades, depending upon the fat content. Heavy cream contains about 40 percent butterfat, 5 percent milk solids, and over 50 percent water. it has about 53 calories per Tablespoon. Light cream contains about 20 percent butterfat and 7 percent milk solids; the rest is water. It has about 32 calories per Tablespoon. Half and half, a blending of heavy cream and milk has about 12 percent butterfat, 7 percent milk solids and 51 percent water. It has about 20 calories per Tablespoon. Heavy cream is added to the ingredients of a cheesecake most often as whipped cream. When whipped, heavy cream will double in volume; for best results, use a chilled bowl and chilled beaters. Often confectioners sugar is added as the cream begins to stiffen to help retain the volume. Heavy cream is perishable, so buy only as much as you plan to use within the next few days. A new ultrapasteurized type of cream is now widely available which has a much longer life. Many people find that it does not whip up as high and that it lacks much of the flavor of the more traditional kind. We leave the choice to you. Light cream is used less often in baking but is available in most supermarkets. It is also very perishable and should be purchased in small quantities. In most cheesecake recipes where light cream is indicated, half and half may be substituted. Half and half is also available in most supermarkets, but you can mix up your own from equal quantities of whole milk and heavy cream. SOUR CREAM: This is cream that has been processed commercially so as to be soured under ideal conditions. It contains about 20 percent butterfat, about 7 percent milk solids and the remainder is water. There are about 30 calories per Tablespoon. Sour cream is sold in containers varying from one half pound to one pound. It is usually dated, so check for freshness when you purchase the container. Sour cream will last up to two weeks in the refrigerator. Most brands seem to be uniformly good. SUGAR AND OTHER SWEETENERS Every desert cheesecake requires a sweetening of some kind. Most of the recipes use granulated sugar. However, it is possible to substitute brown sugar or honey in almost all of the recipes. HONEY: Remember that honey will make your cheesecakes darker, which you may find undesirable. And, since it is less soluble than granulated sugar, it is necessary to be especially careful that it is blended into the cheese mixture. Honey is used as the sweeter in such cheese cakes as Yogurt No-Bake Cheesecake and No Bake Honey Cheese Pie, but if you want to use it in other cakes, you must adjust the quantities. Since honey is sweeter and has a higher moisture content than granulated sugar, use one-third less honey by volume and, when possible, reduce the volume of other liquids by one-fourth cup for each cup of honey used. This can be done by appropriately varying the proportions of dry (cream cheese) and moist (sour cream) dairy products. BROWN SUGAR: This is fine crystals of sugar coated with molasses, sold in either a dark or light form. Brown sugar is used as an ingredient in the Praline Cheesecake, but could be substituted for granulated sugar in other cakes as well. As with the honey, brown sugar will make your cake darker, and you must blend it in well. Measurements will remain the same. We don't recommend using the granulated brown sugar or the liquid form of brown sugar. CONFECTIONERS' SUGAR: Also commonly available, this sugar has been crushed to a fine powder similarly in texture to cornstarch. It is used in cheesecakes primarily in beating egg whites as a means of stiffening them. Often it is also added to whipped cream as a sweetening. FLOUR AND OTHER THICKENING AGENTS Although eggs are generally best for holding together the ingredients of a successful cheesecake, there are several other ingredients that can be used in addition or in place of them. Flour and cornstarch also thicken the batter and stabilize the moisture content. FLOUR: In most recipes, we indicate either all purpose flour or self rising flour. The all-purpose flour can be either bleached or unbleached and today usually comes pre-sifted. If not, sift before measuring. Self-rising flour is bleached flour to which has been added a leavening agent such as baking powder. Whichever you use, remember to use it judiciously. Too much flour will make the cheesecake tough. CORNSTARCH: Finer than flour, cornstarch is more effective as a thickening agent. As with the flour, too much cornstarch will leave your cheesecake tough. GELATIN: Unflavored gelatin is commonly available in one-ounce envelopes. It is a thickening agent that works best when refrigerated, thus this is the basic ingredient in most of the no-bake cheesecakes. It must be blended well with the ingredients and completely dissolved. Too much gelatin will make a rubbery cheesecake. MILK AND MILK PRODUCTS Milk is used infrequently in cheesecakes. Other milk products that appear more frequently in cheesecakes are buttermilk, sweetened condensed milk, and Yogurt. Buttermilk is made when special bacteria are added to lowfat milk; therefore, an average eight-ounce serving has about 100 calories. It is available in most supermarkets, in 1-quart containers. Sweetened condensed milk is evaporated milk to which sugar has been added. It is very high in calories -- about 980 calories in a cup. It is sold, unrefrigerated, in most supermarkets. Yogurt is milk that has been allowed to ferment to a semisolid consistency. It can be made from either whole or skim milk. It is often used as a substitute for sour cream, since it often achieves a similar result. If you do attempt to substitute yogurt for sour cream, use whole milk yogurt if possible and drain carefully of excess water. Yogurt has far fewer calories as well -- about 120 as opposed to sour cream's average of 475 per cup. Yogurt is sold in all supermarkets in eight-ounce and larger containers. You can also make it at home quite easily. EGGS Since the cheeses and creams used in cheesecakes have such a high moisture content, it is necessary to have an ingredient that can hold or absorb water. The most popular and the most elegant solution to this problem is the egg. Also since egg yolks and whites harden as they bake, they add body and texture to the cheesecake. Egg yolks in particular contain lecithin, an emulsifier, which has the effect of congealing the fats in the cheese. Generally a cheesecake recipe with a high fat content will also call for relatively more eggs. EGG WHITES; Many recipes require you to separate the eggs and to beat the whites until they form stiff peaks with the beaters of your mixer. As egg whites are beaten, the albumen is spun out into a finer and finer web of protein, the finer the structure, the more moisture the batter can hold. If the whites are overbeaten or overheated, however, the delicate structure collapses and the result is a soggy cheesecake. Since air is also encapsulated, the egg whites also add lightness to the cake. Oddly enough, the freshest eggs are not the best for cheesecakes; the whites of eggs that are a few days old can be beaten to a larger volume. Unless you have access to farm fresh eggs, though, this isn't likely to be a problem as most of the store bought eggs are already at least several days old. When beating the egg whites, add a dash of cream of tartar to make them more stable. To make the whites stiffer 9 if this is desired) you can blend in some confectioners' sugar or a boiling sugar syrup once the whites have reached the soft peak stage. BUTTER AND SHORTENING Except for a few special cheesecakes, butter is not found among the ingredients in the fillings. However, it is basic for most of the crusts. Please use sweet butter rather than the salted. FRUITS AND NUTS Many of the cheesecake recipes use the grated rind of a lemon or orange. For the best results use the fresh peel rather than the dried because as the peels are dried they lose much of their aromatic oils. The only part of the peel that is used is the outermost, colored layer, called the zest. The zest can be removed with a zester or with any ordinary grater. Many cheesecake recipes call for a small amount of lemon juice. Fresh is the best to use, but good results can be obtained using reconstituted lemon juice. You may wish to experiment, varying the amount to suit your own taste and which kind to use. Many times ground nuts are called for and it has been found that lightly toasting them brings out a better flavor in almonds and hazelnuts (filberts). They retain more of their crunch when used in the batter. To roast the nuts, spread them out on a baking pan and bake for 10 minutes or so in a 350 degree F. oven, stirring occasionally to ensure even browning. If you use hazel nuts (filberts) that still have their paperlike skins, the skins must be removed before use -- they acquire a burnt taste during the roasting. The cost of nuts, especially walnuts, in small quantities is outrageous, but you can save a bundle if you buy them in the bulk and in the shell. Shelled nuts turn rancid fairly quickly, though, store them in the refrigerator or freezer, well wrapped. SPICES AND FLAVORINGS Spices such as cinnamon, cloves, ginger, nutmeg, and cardamom will appear frequently in cheesecake recipes because the contrast so well with the mildness of the cheeses. Spices do deteriorate as they sit on your rack, so be sure to always have fresh ones on hand for your baking day. Cinnamon and ginger can be used ground commercially, but you may want to grate your own nutmeg and grind your own cloves or cardamom from the whole spices. A coffee grinder is one of the best ways to do this. Certain flavorings such as vanilla extract or instant-coffee powder are used in cheesecakes. Rosewater is used in some and can be found in specialty stores as well as the drugstore. Chocolate is used in the mocha-flavored and chocolate-flavored cheesecakes. Please use the real chocolate, baking or semi-sweet when making the cakes.