Decide your goal: match Tuaca’s vanilla warmth, its orange brightness, or both (most cocktails need both).
Use the table ratio to swap in your chosen substitute for the Tuaca amount in the recipe.
If your substitute is missing vanilla, add vanilla syrup (or a tiny amount of vanilla extract) in small increments.
If your substitute is too sweet or too orange-forward, balance with a small splash of citrus (lemon or orange juice) or reduce by 10–25% next time.
Taste after mixing: Tuaca is meant to be sweet-warm, not sharp—aim for rounded citrus with a vanilla finish.