Chopping generally reduces cooking time compared to larger cuts because it increases the surface area exposed to heat, allowing for faster and more even cooking. Smaller pieces cook quicker.
Chopping involves cutting ingredients into small, roughly equal-sized pieces. This significantly increases the surface area of the food that is directly exposed to the heat source, whether it's a pan, oven, or grill. The increased surface area allows heat to penetrate the food more quickly and efficiently, leading to faster cooking times. For example, chopped vegetables in a stir-fry will cook much faster than whole vegetables roasted in the oven. Similarly, ground meat, which is essentially finely chopped meat, cooks much faster than a whole steak. The smaller the pieces, the less time it takes for the heat to reach the center and cook the food thoroughly. This principle applies to various cooking methods, including sautéing, boiling, and frying.
When chopping ingredients for even cooking, try to maintain a consistent size across all pieces. Inconsistent sizes will result in some pieces cooking faster than others, leading to unevenly cooked dishes.