Chicken stock is a heavily concentrated reduction of bones and bony parts along with a lesser (if any) amount of breasts, thighs, and legs. Fresh vegetables and seasonings can be added for richer flavoring. After straining, stock will turn gelatinous when cooled (as opposed to broth, which remains in a mostly liquid state).
To create a true stock, the liquid and chicken carcass – plus added ingredients – must simmer for a minimum of six hours. This results in a darker concentrate that is then added to recipes. Many cooks refer to a stock as the “foundation of the kitchen,” which translates into the French “fond de cuisine.”
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