Yes, it's easy to grab a box of broth at the grocery store but making this homemade chicken stock is definitely worth it. Our version is clean-tasting and neutral so you can use it in all types of cuisines. We left out the salt, so you can adjust the level to suit your recipe or taste. Instead of using a whole chicken, we call for bones because they add body to the finished stock. Save chicken bones in the freezer until you have enough to make a batch or order them from your butcher.
Put the chicken backs and bones, carrots, celery, onion, parsley, leek greens, garlic, black peppercorns and 6 quarts (1 1/2 gallons) of cold water in a large stock pot. Set over high heat and bring to a boil. Lower the heat to maintain a gentle simmer and cook until the stock has reduced by about a third, about 3 hours, occasionally skimming away the fat and scum.
Use a slotted spoon or tongs to remove the large pieces of vegetable and bone from the pot and discard. Strain the stock through a fine-mesh sieve into another large stock pot. Cool completely, cover and store in the refrigerator for up to 3 days or in the freezer for up to 3 months.