Clam juice is made by extracting the juice from clams. Typically salt is added so the juice tends to be pretty salty (about 30mg of salt per tablespoon). To translate that would be 420mg of salt per cup of clam juice. The upside it is capable of adding a lot of flavor to a recipe.
Clam juice is very handy to have in your pantry. You can use this juice to add to soups and chowders, to make a delicious dill sauce to use over salmon or it is commonly used as an ingredient in many clam sauce recipes used over pasta. You can even use it to deglaze a pan and create a simple clam pan sauce.
You can find clam juice in bottles (our preferred) or cans. Most likely you won't have to look further than your grocery store shelves. My local grocery places it by the canned tuna. You can find it online at Jet.com as well as several version which are available at good old Amazon.com: Clam Juice We really like Bumble Bee brand because it has good flavor and is a product of U.S.A.
Don't have clam juice? For one cup of clam juice you can substitute: 1 cup of fish stock OR>1 cup dashi OR> For an alternative flavor use 1/2 cup chicken broth + 1/2 cup water
clam juice (water, extract of clams), salt