How can mochi stretch so much?

Mochi can stretch significantly due to its primary ingredient, glutinous rice (or sweet rice), which has a high starch content. When the rice is steamed and then pounded, the starch granules gelatinize and create a sticky, elastic texture. This unique property allows mochi to be molded and stretched without breaking, making it ideal for various culinary uses. The process of kneading also contributes to its chewy consistency, enhancing its stretchability.