Granulated Sugar and Cornstarch Blend (Best Option)
1 cup granulated sugar plus 1 tablespoon cornstarch to replace 1 cup powdered sugarPowdered sugar is essentially granulated sugar ground finely with a small amount of cornstarch to prevent clumping. In cream sauces, smoothness is critical, so blending granulated sugar with cornstarch replicates both sweetness and texture. The cornstarch also helps stabilize the sauce by absorbing excess moisture.
For best results, pulse the granulated sugar and cornstarch in a food processor until very fine before adding to the sauce. This ensures quick dissolution and prevents gritty texture.
Compared to pure powdered sugar, this substitute maintains the sauce’s smoothness and sweetness without introducing additional flavors or moisture, preserving the integrity of the cream sauce.