Cooking: the practice of preparing food by heat

Common methods

Techniques differ by how they transfer heat. Broad categories include dry-heat methods (such as roasting, baking and grilling) and moist-heat methods (such as boiling, steaming and poaching). Many cuisines use combinations—for example, searing then braising—to build flavor and tenderness.

• Dry heat: roasting, baking, frying, grilling.
• Moist heat: boiling, steaming, stewing, simmering.
• Other: sous-vide, smoking, microwave, fermenting (non-thermal).

Chemistry, nutrition and safety

Cooking causes physical and chemical changes. Heat denatures proteins, gelatinizes starches and triggers browning reactions that develop complex flavors. It can increase the bioavailability of some nutrients while reducing others. Importantly, appropriate heating helps kill bacteria and other pathogens; this is a key reason many foods are not eaten raw. However, overcooking can degrade vitamins and create undesirable compounds, so balancing time and temperature is important.

History and cultural role

Using fire to prepare food is one of humanity's oldest technologies and a major factor in cultural development. Cooking traditions reflect local ingredients, climate, religious practices and social customs. Recipes and techniques evolve over generations, producing regional cuisines and household practices that define identity and social life.

Equipment, examples and practical tips

Common tools include pans, pots, ovens, grills and knives. Modern kitchens add appliances like blenders and microwaves. Simple examples: boiling vegetables to soften them, roasting meat to concentrate flavor, steaming fish to preserve moisture. When learning, focus on technique—controlling heat and timing—rather than memorizing many recipes. For safety and quality, combine proper handling with suitable heating: cool perishables quickly, reheat thoroughly, and avoid cross-contamination.

Distinctions and notable facts

Not all foods must be cooked; some fruits, vegetables, nuts and certain seafoods are commonly eaten raw. Cultural preferences influence whether a dish is traditionally raw or cooked. For further reading on methods and hygiene best practices, see resources such as technique guides and food safety sites at public health agencies covering raw foods. Practical experimentation and attention to safety are the foundations of competent cooking.