Dried parsley is a common herb made from the dehydrated leaves of the parsley plant. It provides a mild, earthy flavor and adds a green color to soups, sauces, and rubs with a shelf life of up to one year. Cooking Ratios and UseFresh to dry: Use one teaspoon of dried parsley for every one tablespoon of fresh parsley. Best uses: Add it to long-cooking dishes like soups, stews, and stocks where the dried leaves can rehydrate.