Cooking, cookery, or culinary arts is the art, science, and craft of using heat to prepare food for consumption. Cooking techniques and ingredients vary widely, from grilling food over an open fire to using electric stoves, to baking in various types of ovens, reflecting local conditions.
Types of cooking also depend on the skill levels and training of the cooks. Cooking is done both by people in their own dwellings and by professional cooks and chefs in restaurants and other food establishments.
Preparing food with heat or fire is an activity unique to humans. It may have started around 2 million years ago, though archaeological evidence for it reaches no more than 1 million years ago.
Cooking can be more than just making food for day-to-day meals. It can transform routine to a passion. Cooking may be the oldest and most widespread application of chemistry and recipes may be the oldest practical result of chemical research. We have illustrated just a few food items and the chemistry behind them.