Water with a pinch of salt (Best Option)
1 cup water + 1/8 teaspoon salt per 1 cup vegetable brothVegetable broth in vanilla cake recipes mainly provides moisture and a slight savory undertone to balance sweetness. Using water with a pinch of salt replicates the moisture content and adds a mild savory note without overpowering the cake's flavor. This substitution leverages the salt to enhance the vanilla and sugar flavors subtly.
For best results, ensure the salt is evenly dissolved in the water before mixing into the batter to avoid uneven seasoning. Avoid adding too much salt as it can easily overpower the delicate sweetness.
The final cake will have a clean vanilla flavor similar to the original recipe, with no unexpected savory notes, preserving the intended texture and crumb.