
Kosher is a Hebrew word that means fit, and when applied to food, it shows that it's OK for someone who follows kosher laws to eat. Kosher food complies with traditional Jewish law, which is derived from the Torah, the first five books of the Hebrew Bible. The laws of kashrut apply to food derived from living creatures, and kosher foods are restricted to certain types of mammals, birds, and fish that meet specific criteria. Meat and dairy must be separated in cooking, serving, and eating, and all utensils and equipment used to process and clean meat and dairy must be kept separate. Pareve food items are considered neutral and can be eaten with either meat or dairy, but if they are prepared or processed using equipment that processes meat or dairy, they are reclassified as meat or dairy.
| Characteristics | Values |
|---|---|
| Definition | "Kosher" describes food that complies with traditional Jewish law. |
| Food Pairing | Meat and dairy products cannot be mixed. |
| Food Preparation | Utensils and equipment used for meat and dairy must be kept separate. |
| Consumption | After eating meat, wait 3-6 hours before consuming dairy. |
| Pareve Food | Foods that are neither meat nor dairy, such as fish, eggs, vegetables, and grains, are considered neutral and can be eaten with either meat or dairy. |
| Meat | Must be slaughtered according to Jewish law, with all blood drained and removed through salting and soaking. |
| Dairy | Includes milk, cheese, and yogurt, and any product containing them. |
| Certification | Kosher-certified products have labels indicating they meet the necessary requirements, such as a "K" or a "U" in a circle. |
| Passover | Only certain grain products, such as matzah, are kosher for Passover and must be certified. |
| Vegan Diet | Can be kosher if all ingredients are certified kosher and prepared according to guidelines, avoiding mixing meat and dairy. |
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What You'll Learn

Meat and dairy separation
Kosher is a Hebrew word that means "fit", and when applied to food, it shows that it's suitable for someone who follows kosher laws to eat. Kosher dietary guidelines forbid certain food pairings, particularly the pairing of meat and dairy.
Meat and dairy foods may not be cooked together or eaten together. This prohibition is so stringent that one may not even derive benefit from a combination of meat and dairy foods; for example, selling such a combined product or feeding it to a pet. To ensure total separation, a kosher kitchen requires the use of separate utensils, accessories, appliances, cookware, dishes, and cutlery for meat and dairy. It is also necessary to wait a certain amount of time after eating meat before consuming any dairy product, and vice versa. The particular length of time varies among different Jewish customs but is usually between 1 and 6 hours.
All meat, fowl, and meat parts in any product, including items such as liver pills, must come from a kosher animal that was slaughtered, examined, and had its blood drained off according to Jewish dietary laws to be considered kosher. Meat products include beef, lamb, or venison, and kosher poultry such as chicken, goose, duck, or turkey. All foods derived from or containing milk are considered dairy or milchig (Yiddish), and even a small amount of dairy in a food product can cause it to be considered dairy. Dairy products include milk, butter, yogurt, and all types of cheese.
Foods that are neither meat nor dairy are called pareve or neutral. These include fish, eggs from permitted birds, produce, grains, fruit, and other edible plants. They remain pareve if they are not mixed with or processed using equipment that is used for any meat or dairy products.
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Animal slaughter and blood removal
Kosher food is food that complies with traditional Jewish law. The laws of kashrut apply to food derived from living creatures, and kosher foods are restricted to certain types of mammals, birds, and fish that meet specific criteria. The flesh of any animals that do not meet these criteria is forbidden by the dietary laws.
Kosher mammals and birds must be slaughtered according to a process known as shechita, and their blood may never be consumed. The animal must be conscious during the slaughter, which is carried out by a trained and certified Jew known as a shochet, often a rabbi. The knife used, called a chalef, must be perfectly sharp and at least twice the width of the animal's neck, and the slaughter must be performed in a single movement, with a back-and-forth motion. The trachea and oesophagus must be severed, and the spinal cord should not be cut. The animal's head should not be completely severed, and the slaughter must be performed out of sight of other animals. The meat is then soaked and salted to remove residual blood. This process is known as koshering or melichah ("salting").
The Torah states that whoever wishes to eat meat must first slaughter the animal: “Thou shalt slaughter of thy herd and of thy flock, which the Lord hath given thee, as I have commanded thee, and thou shalt eat within thy gates, after all the desire of thy soul” (Deuteronomy 12:21). Administering an electric shock or anaesthetic to an animal prior to slaughter is prohibited, as it may render the animal unfit to eat.
After slaughter, the meat undergoes a post-procedure inspection, in which the animal is checked for lesions, especially in the lungs and liver. The carcasses are then classified as chalak (or glatt), kosher, or terif. Glatt kosher is the strictest form, and involves inspecting the lungs to ensure they are smooth. If any defects are found, the animal is considered treif, and therefore non-kosher.
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Pareve foods
Kosher is a Hebrew word that means "fit", and when applied to food, it shows that it's okay for someone who follows kosher laws to eat. The general principles of keeping kosher are in the Torah, the first five books of the Hebrew Bible. It has commandments—called mitzvahs—to follow as ways to obey God. Keeping kosher is one of them.
Some kosher households include a third set of pareve dishes or cooking utensils to enable pareve foods to be prepared and then later served with either dairy or meat meals.
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Kosher certification
To receive kosher certification, a food product must undergo a detailed study of all ingredients used, the method of production, and all products produced. All ingredients must be evaluated and identified at two interface levels, and any changes to the list of ingredients must be reported to the certification agency. The production process must also be approved by a kosher auditor to ensure it meets kosher requirements. For example, if meat and dairy products are both being produced in the same plant, the two systems must remain completely separate, including the avoidance of heat transfer by shared boilers.
After a company is successfully certified, they will receive a letter of certification (LOC) and a list of pre-approved raw materials that may be used in the kosher facility. The company will also be allowed to display the certification agency's trademarked symbol on their products or in-store certificates.
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Kosher salt
In cooking recipes, particularly in the United States since the 2010s, kosher salt has largely replaced fine-grained table salt. It is widely available and commonly used by chefs and home cooks alike. The consistency and wide-reaching availability of brands like Diamond Crystal kosher salt have contributed to its popularity. However, it is important to note that not all brands of kosher salt are created equal in terms of salinity by volume, so it is recommended to stick to a preferred brand once it is found.
When substituting kosher salt for table salt in recipes, adjustments are necessary due to the difference in crystal shape and iodide content. Generally, it is advised to use less than half of the amount of table salt specified in the recipe and then adjust to taste. This is especially important in baking, where over-salting can ruin a dish.
In addition to its culinary uses, kosher salt can also be used as an abrasive cleaner for cookware. When mixed with oil, it retains its abrasiveness and can easily be dissolved with water after cleaning, making it a preferred choice over other cleansers that may leave a residue.
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Frequently asked questions
Kosher is a Hebrew word that means "fit". It is used to describe food that complies with traditional Jewish law.
The main kosher dietary guidelines include the separation of meat and dairy products, the avoidance of certain animals and animal products, and the consumption of only kosher-certified foods during religious holidays such as Passover.
For meat to be considered kosher, it must come from an animal that meets specific criteria, such as having cloven hooves and being a ruminant. The animal must be slaughtered according to Jewish law, and all blood must be drained from the meat.
Non-kosher foods include pork, shellfish, and gelatin made from non-kosher animals. Additionally, dairy products are considered non-kosher if they contain non-kosher ingredients or are processed using non-kosher equipment.


































