A cookbook is a book that teaches you how to prepare different foods, with step-by-step instructions called recipes. Each recipe lists the ingredients you'll need (like flour, eggs, and sugar for cookies) and tells you exactly what to do with them: how long to mix, what temperature to bake at, and when each step happens.

Cookbooks have existed for thousands of years. The oldest known cookbook comes from ancient Rome. Before printing was invented, people copied recipes by hand and passed them down through families. Today, cookbooks cover every type of cooking imaginable: baking desserts, grilling outdoors, making food from different countries, or cooking simple weeknight dinners.

Some cookbooks focus on a single topic, like The Joy of Cooking Bread or A Kid's Guide to Mexican Food. Others try to cover everything a cook might want to make. Many families treasure old cookbooks with notes written in the margins, where someone's grandmother marked her favorite recipes or adjusted the measurements to make them even better.

The word also describes any organized collection of instructions. Computer programmers use cookbooks that provide tested solutions to common problems. In this sense, a cookbook is any reliable guide that helps you accomplish something step by step.