While you can substitute chicken broth for fish stock in gumbo or other seafood soups and stews, it may significantly alter the overall flavor profile of the dish. Fish stock has a distinct seafood flavor that enhances the taste of dishes with seafood ingredients, adding depth and richness that chicken broth may not provide.
If you don't have fish stock on hand and need to use chicken broth, here are some tips to make the substitution work:
Use a light chicken broth: If possible, choose a light chicken broth or homemade chicken stock. A strongly flavored chicken broth may overpower the delicate seafood flavors.
Enhance the seafood flavors: To compensate for the lack of fish stock, you can try adding some additional seafood ingredients like shrimp shells, fish bones, or clam juice to the chicken broth. Simmer these seafood components in the chicken broth for a while before using it in the recipe. This will help to infuse some seafood essence into the broth.
Season accordingly: Be prepared to adjust the seasoning and spices in the recipe. Since fish stock contributes to the overall seasoning profile of the dish, you may need to increase the use of other seasonings and herbs to ensure the desired flavor balance.
Consider using a seafood seasoning blend: Using a seafood seasoning blend that complements the flavors of the seafood can help to enhance the taste of the dish even when using chicken broth.
Remember that while a chicken broth substitute might work, it won't be exactly the same as using fish stock. If possible, try to use fish stock for seafood-based soups and stews to achieve the most authentic and flavorful results. If you have the time and ingredients, making your own fish stock using fish bones and aromatic vegetables can take your seafood dishes to the next level.