The Complete Handbook of Cheese

Chapter 1: Understanding Cheese

Cheese is not an artisanal mystery. It is food engineered through fermentation, moisture control, and salt—a set of deliberate decisions made by producers that determine how a cheese will taste, melt, age, store, and perform when you use it. Understanding what cheese is, at a practical level, means understanding these decisions and why they matter when you are evaluating, choosing, storing, and using cheese in a professional or serious hobbyist context.

At its core, cheese begins with milk. Milk contains three primary components: water, milk fat (cream), and milk solids—mostly protein (casein) and lactose (milk sugar). When a cheesemaker adds rennet (an enzyme) to warm milk, the casein proteins coagulate and trap the fat, forming a solid curd while the liquid whey (water, lactose, and other proteins) separates. This is the first critical decision: how much whey to remove determines how much moisture remains in the final cheese, and moisture governs shelf life, texture, aging potential, and how the cheese will behave during cooking.

A fresh cheese like ricotta or quark removes almost all whey, leaving a wet, spreadable product with very high moisture (typically 70 percent or more). This cheese is shelf-stable only for days or a few weeks because the high moisture content supports rapid bacterial and mold growth. A hard cheese like Parmigiano-Reggiano removes nearly all whey through long, careful heating and stirring of the curds, leaving moisture at 30 percent or lower. This low moisture is hostile to most organisms that cause