Roughly chop the carrots, celery, onion, and garlic. I like to quarter the onion and chop the carrots and celery into larger pieces.
3-4 cloves garlic
Place the chicken carcass, along with bones and skin, into the bottom of a large pot. Toss the chopped vegetables on top of chicken pieces.
1 chicken carcass, 1 large yellow onion, 3 large carrots, 4 celery ribs
Pour the apple cider vinegar into the pot, and add the bay leaves, any herbs, and salt, if using. Add enough water to just cover all ingredients in the pot.
2 bay leaves, Optional additional herbs like 1/2 bunch of fresh parsley, 4-5 sprigs fresh thyme or rosemary, etc., 2 Tablespoons apple cider vinegar, 10-12 cups water, 1 teaspoon kosher salt
Bring the pot to a boil and then reduce heat to a low simmer.
Continue to simmer for at least 6 hours. Frequently check the water level. You’ll need to add water throughout the simmering process as some will evaporate.
After 6 hours, remove from heat. Allow to cool.
Once cooled, pour contents through a fine mesh strainer into a large bowl. This step will separate the veggies and chicken pieces from the broth. Discard chicken and veggies.
Transfer broth to large jars for storing.