Oats is the top-ranked Polenta substitute for Soup, chosen for how well it preserves Soup's structure, moisture, and flavor. 1 options are ranked on this page by Soup-specific applicability.
Polenta plays a specific role in Soup — structure, rise, moisture, or flavor — and substitutes that miss the role relevant to Soup rank lower here than they might elsewhere. The list above is tuned to Soup, not to generic baking or cooking.
Start with the listed ratio but watch for Soup-specific warnings below each card — some subs need a moisture tweak, heat adjustment, or companion ingredient to work in Soup. Taste a small batch before committing.