White Sugar + Molasses (Best Option)
1 cup white sugar + 1 tablespoon molasses per 1 cup brown sugarBrown sugar is essentially white sugar with molasses added back in, which provides moisture and a complex caramel flavor. By mixing white sugar with molasses, you recreate these characteristics, preserving the cake’s tenderness and depth of flavor.
For best results, thoroughly blend the molasses into the white sugar before adding it to the batter to ensure even moisture distribution. Avoid adding excess molasses as it can make the batter too wet.
This substitute closely matches the original brown sugar’s impact on the cake’s crumb and flavor, resulting in a moist, tender vanilla cake with the expected caramel undertones.