Soy Sauce (Best Option)
1 teaspoon per 1 tablespoon of fish sauceSoy sauce contains glutamates that provide umami similar to fish sauce, helping to deepen the chocolate flavor without adding fishy notes. It is thinner and less salty, so a reduced amount is recommended.
When using soy sauce, choose a light or regular variety to avoid overpowering the cake. Mix it well into the batter to ensure even distribution.
The final cake will have a subtle savory depth that complements the chocolate, making it richer and more complex without altering sweetness or texture significantly.