Granulated Sugar and Cornstarch Blend (Best Option)
1 cup granulated sugar + 1 tablespoon cornstarch = 1 cup powdered sugarPowdered sugar is essentially granulated sugar ground to a fine powder with a small amount of cornstarch to prevent clumping. By blending granulated sugar with cornstarch and processing it in a food processor or blender, you create a substitute that dissolves quickly and distributes evenly in the batter, preserving the texture of quick bread.
For best results, pulse the granulated sugar and cornstarch until very fine, then sift before use to avoid lumps. This substitute maintains the dry ingredient balance, which is critical for the rise and crumb of quick bread.
Compared to pure powdered sugar, this blend may have a slightly coarser texture if not finely processed, but it will not significantly affect the final breadβs tenderness or sweetness.