Servings: 10
Add 5lbs Beef Bones (see notes) to large stock pot. Cover with water and boil for 15 minutes. Drain and rinse.
Cover cooked bones with fresh water. Add 2 large quartered Onions, 2 coarsely chopped Carrots, 2 coarsely chopped Celery Stalks, 1 Bay Leaf, 6 sprigs Thyme, and 1 tsp Apple Cider Vinegar. Simmer for 12 hours.
Strain and enjoy. Refrigerate for up to 4 days or freeze for up to 6 months.