What Is Kosher? An Introduction to Kashrut in Judaism provides an accessible introduction to one of the most recognizable and enduring aspects of Jewish religious life, i.e., the dietary laws known as kashrut. Written for readers with little or no prior knowledge of Jewish practice, the book explains not only what foods are considered kosher but also the religious principles, historical development, and spiritual values that underlie the Jewish dietary system. Rather than treating kashrut as merely a collection of rules, the book presents it as an expression of Jewish identity, discipline, and covenant that has shaped Jewish communities for thousands of years.
Beginning with the biblical foundations of the dietary laws, the book introduces readers to the passages in the Torah that distinguish between permitted and prohibited foods. It explores the characteristics that determine which land animals, birds, fish, and other creatures may be consumed according to Jewish law, while also examining the broader theological themes that have traditionally been associated with these commandments. By placing the biblical texts within their historical and religious context, the discussion helps readers appreciate why dietary observance became such a defining feature of Jewish life.
The book continues by examining the rabbinic development of kashrut and the practical application of Jewish dietary law in everyday life. Readers are introduced to essential concepts such as ritual slaughter (sheḥitah), the prohibition against consuming blood, the separation of meat and dairy, and the kosher preparation of food. Rather than assuming familiarity with technical legal terminology, the work explains these practices in a clear and approachable manner, demonstrating how centuries of rabbinic interpretation transformed biblical commandments into a comprehensive system governing food preparation, kitchen organization, and communal dining.
In addition to explaining the laws themselves, the book explores the religious, ethical, and cultural significance of keeping kosher. It considers how dietary observance has served as a visible marker of Jewish identity, strengthened communal cohesion, and reinforced daily awareness of religious values. The discussion also addresses common questions raised by those encountering kashrut for the first time, including the purpose of kosher certification, the role of rabbinic supervision, and the practical challenges of observing the dietary laws in contemporary society.
Designed as an introductory guide, What Is Kosher? serves students of Judaism, members of the Jewish community, prospective converts, clergy, educators, and anyone interested in understanding one of Judaism's central religious practices. By combining historical background, biblical foundations, and practical explanation, the book offers readers a balanced overview of how kashrut developed and why it continues to occupy an important place in Jewish religious life around the world.
The term Kashrut refers to the Jewish religious dietary laws derived from the Torah. The term kashrut is derived from the Hebrew word kasher meaning fit or acceptable. From the word kasher, we derive the word kosher in its anglicized form. But before we discuss what kosher is, let’s discuss some ideas as to “why” kosher exists. Why after all, would a religious faith be concerned about what people eat? This book answers these questions and provides the student or curious individual with the basics of what kosher is and why it is observed by religious Jews around the world.
