All-Purpose Flour (Best Option)
1 cup minus 2 tablespoons per 1 cup cake flourAll-purpose flour has a higher protein content than cake flour, which means it can provide slightly more structure and thickening power. In salad dressings, this translates to a stable emulsion and a smooth mouthfeel without graininess.
To avoid a heavier texture, reduce the amount slightly compared to cake flour and whisk thoroughly to prevent lumps. Heating gently while stirring helps activate the thickening properties.
Compared to cake flour, the dressing may be marginally thicker and less tender, but the difference is minimal and generally unnoticeable in a dressing context.