TECHNIQUE GUIDE

Cooking technique guide

Check the core principles of cooking techniques and how to handle ingredients step by step.

COOKING TECHNIQUE

Boiling

Boiling is a cooking method that submerges ingredients in boiling water or sufficiently hot liquid to cook them through evenly. Because the liquid surrounds the surface, heat transfer is relatively uniform, and it is used to soften vegetables, cook starches in pasta or grains, and cook firm items like meat or eggs to the desired doneness. The key is to adjust the state of the water to suit the ingredients. A vigorous boil is suitable for ingredients that move without breaking, such as pasta or sturdy root vegetables, but for fish, dumplings, or delicate vegetables that break apart easily, a gentle simmer is more stable. After boiling, drain and remove excess water, or, if needed, cool in cold water to stop carryover cooking. Boiling uses little fat and allows large-scale cooking, but some flavor and soluble components can leach into the water. If you plan to use the broth, you can take advantage of this change; but if the goal is the ingredient’s own rich flavor and crisp texture, boil briefly or use a different method.

Core principles

Water does not stay at the same intensity once it starts boiling, so after adding the ingredients monitor the size of the bubbles and their movement to adjust the heat. If vigorous bubbles shake the ingredients too much, breaking the surface or tearing noodles, lower the heat to a gentle simmer.
When the size and thickness of ingredients are similar, the cooking times become more even. If you must boil large and small pieces together, add the larger pieces first or add smaller pieces later to match the center doneness.
During boiling, starches, proteins, and aromatics from the ingredients diffuse into the water. Noodles and other starch-rich ingredients absorb water in plentiful water to reduce sticking; for ingredients intended for stock, reduce the amount of water to concentrate the flavor.
Doneness is checked more accurately by texture than by a time chart. Cut into the thickest part and compare center color and firmness; when slightly undercooked relative to the target, consider the next cooking step or residual heat.

Well-matching ingredients

Hard root vegetables such as potatoes, carrots, and radish become softer through cell wall breakdown during boiling, making them good for mashing or stewing when they are tender enough to be pierced through with a fork while maintaining shape.
Starchy ingredients like noodles, pasta, and rice cakes cook by absorbing water in boiling water. If you plan to fry or sauce them afterwards, remove when the center still has a very slight resilience to avoid over-soaking.
Eggs are well suited to boiling because the shell protects the contents, but maintain consistent control of the starting water temperature and cooking time to achieve the desired yolk texture. Depending on whether you will use them immediately after boiling or cool and store/handle them, the cooling method may vary.
Meat that is relatively chewy, such as chicken or pork used for boiled dishes, can become tender by simmering for a long time. However, very tender or thin fish or lean meat can become tough or fall apart if boiled for too long, so other methods may be more appropriate.
Delicate vegetables like broccoli or spinach can be softened with a short boil. If you value crispness and bright color, it is better to blanch quickly rather than long-boiling.

Heat and time management

The moment you add ingredients affects the result. For noodles or leafy greens, add them after the water is vigorously boiling to cook the surface quickly; for ingredients that need to cook through slowly like potatoes or eggs, you can also use a method that heats in cold or lukewarm water.
A strong boil speeds up cooking, but the water temperature does not rise much above the boiling point. Rather than increasing flame, control the boil by adjusting water quantity, lid usage, and ingredient amount so the boil does not drop too far.
Adding too many ingredients at once lowers the water temperature and lengthens the time to return to a boil. Divide the same amount into several batches, or use a wide pot to reduce uneven cooking.
The handling after boiling is included in the cooking time. If left in the hot pot, carryover heat will continue to soften; when the desired texture is reached, lift them out or, if needed, rinse in cold water to stop heat quickly.
Cold-water rinsing helps wash surface starch from noodles and slows further cooking of vegetables, but for noodles that will be mixed with a warm sauce immediately, the sauce may not cling as well; in that case, do not rinse and simply adjust the moisture.

Success points

Choose a pot large enough so that the ingredients are fully submerged and water does not boil over. Noodles expand in volume and foam, so a roomy pot is easier to manage than a too-small one.
Add salt with consideration of both the flavor and the amount of water that will boil; if you will not eat the broth, avoid overly salty water, and if the ingredients are already salted or the sauce will be added later, start with a lighter seasoning.
Stir vegetables and noodles once or twice during cooking to prevent sticking to the bottom or each other. When the surface weakens, stir gently with a wide utensil to avoid breaking.
When draining, taste a piece from different parts and the thickest part. If the center is undercooked, maintain the boil briefly and finish cooking; if the exterior is too soft, adjust the size or starting time next time.
If using the boiled water for another purpose, plan the amount of aromatics and salt from the start. Conversely, if a clear color and clean taste are important, skim off foam and scum, and do not boil different strongly scented ingredients in the same water.

Common mistakes

If the water boils too strongly and the dumpling skins burst or fish flesh flakes, reduce to a gentle simmer just before boiling rather than maintaining a high flame; heat will still transfer sufficiently.
If the ingredients are added and the water cools but you still follow the original time, the inside may remain undercooked. When the water returns to a stable boil, monitor texture from there and adjust timing.
If vegetables become dull and overly soft after boiling, next time remove them slightly earlier. For applications where texture matters (salads or crunchy dishes), immediately cool to reduce carryover heat.
If noodles clump together and become sticky, the water may have been insufficient or they were not stirred at insertion. Use ample water and loosen them gently right after adding and again when boiling resumes.
If you boil meat for a long time at a strong boil and the surface becomes coarse and the meat dry, next time start with removing surface foam and switch to a gentler simmer. For cuts that require tenderness, steady temperature and sufficient time are more favorable than rapid boiling.
If boiled ingredients are rinsed in cold water unconditionally and taste becomes bland, separate the rinsing purpose. For noodles that will be served cold or vegetables that will not receive additional cooking, rinse with a strainer to remove water and heat only, instead of rinsing.