Generally, there is no need to thaw frozen wontons before cooking them.
During the freezing process, the moisture inside the wontons forms ice crystals. Cooking them without thawing allows the temperature to rise rapidly in the hot water and the ice crystals to melt quickly, which helps preserve the wontons' shape and texture. If thawed, the surface softens, making them prone to sticking together during cooking, which compromises both appearance and mouthfeel. Furthermore, cooking thawed wontons can lead to uneven cooking-where the surface is already done but the interior remains undercooked or raw. Cooking directly also saves time; simply transfer them from the freezer to boiling water and cook according to the package instructions to achieve delicious results.
Cooking without thawing preserves the shape: Since the internal moisture forms ice crystals during freezing, cooking directly allows the hot water to melt these crystals quickly. This ensures the wontons retain their original form without deforming due to softening. You will see them remain intact and plump during cooking, free from sticking or breakage, resulting in a more appealing presentation.
Prevents sticking: Thawed wontons have soft surfaces that easily stick together during cooking, affecting the texture. Cooking without thawing keeps the surfaces relatively dry, so they do not stick easily as they tumble in the water; this ensures each wonton cooks individually, resulting in a smoother, more pleasant mouthfeel.
Ensures thorough cooking: Thawing before cooking can cause the exterior to cook faster than the interior, leading to undercooked centers. Cooking directly allows for even heat distribution, ensuring the wontons cook thoroughly from the outside in and maintaining their quality and texture. Simply follow the cooking time on the package to produce perfectly cooked, delicious wontons.
