โญ Potato Starch (Best Nut-Free Option)
1:1 (use equal amount as cornstarch)Potato starch is a fine, neutral-tasting starch that gelatinizes at a similar temperature to cornstarch, providing excellent binding and moisture retention in dough. This helps maintain the dense, chewy crumb typical of bagels without making them gummy or overly soft.
When using potato starch, ensure it is well incorporated into the dough to avoid clumping. Because it absorbs moisture efficiently, monitor dough hydration to prevent dryness.
Compared to cornstarch, potato starch yields a very similar final texture and chewiness in bagels, making it the most reliable substitute without compromising traditional qualities.