tapioca starch or cornstarch

Tapioca starch is a refined carbohydrate extracted from the cassava root (Manihot esculenta), a woody shrub native to South America. The starch is obtained by grating and pressing cassava root to release the starch granules, which are then dried and processed into a fine white powder. Tapioca starch is nearly pure starch, mild in flavor, and characterized by its fine, uniform particle size. It differs from cornstarch, which is extracted from corn kernels and has slightly larger starch granules, though both serve similar culinary functions.

Cornstarch, also called corn flour in some regions, is a refined starch derived from the endosperm of corn kernels (Zea mays). It is produced by separating the starch from the protein and germ components of the kernel through wet milling. Cornstarch appears as a fine white powder with a characteristic slight sweetness and is virtually flavorless when cooked. Both starches are chemically similar amylose-amylopectin polymers, but their granule sizes and gelatinization temperatures differ slightly, affecting their performance in cooking.

Both tapioca and cornstarch function as thickening agents in gravies, sauces, puddings, and soups. Cornstarch is particularly valued for creating glossy, transparent sauces in Asian stir-fries and for coating foods before frying. Tapioca starch is used in baking, as a binder in gluten-free formulations, and produces characteristic chewy textures in bubble tea and desserts. Both starches are employed in custards, fruit fillings, and puddings. Cornstarch is slightly more efficient as a thickener (1 tablespoon cornstarch thickens like 1.5 tablespoons tapioca), and tapioca produces a less glossy finish. Both are used in Asian cuisine, with cornstarch dominant in wok cooking and tapioca prevalent in Southeast Asian sweets and savory preparations.