Water with a touch of vanilla extract (Best Option)
1 cup water + 1/2 teaspoon vanilla extract per 1 cup vegetable brothWater is neutral and will not interfere with tiramisu’s delicate flavor balance. Adding vanilla extract introduces a subtle sweetness and aromatic note that aligns well with the dessert’s traditional flavor components.
For best results, use pure vanilla extract and add it after measuring the water to avoid over-flavoring. Stir gently to distribute the vanilla evenly.
This substitution preserves the intended texture and moisture level of the original recipe while enhancing the dessert’s characteristic vanilla and cream flavors, making it the closest match to vegetable broth without the unwanted savory taste.