Granulated Sugar (Best Option)
1 tablespoon per 1 tablespoon powdered sugarGranulated sugar works as a substitute because it provides pure sweetness without additional flavors or moisture. In hot liquids like soup, granulated sugar dissolves effectively, ensuring the soup maintains its intended sweetness.
To ensure full dissolution, add the sugar gradually while stirring the soup over heat. Avoid adding all at once to prevent graininess.
Compared to powdered sugar, granulated sugar may leave a slightly less smooth texture if not fully dissolved, but the flavor impact is minimal and generally acceptable in soups.