Turn leftover brisket trimmings or other beef fat into rich, creamy beef tallow, perfect for cooking, frying, or adding moisture and flavor to smoked meats.
Place one cup of water and the beef trimmings in a stockpot. Cover.
Cook over low to medium heat until the fat has rendered down, around 2-3 hours, stirring every 20 to 30 minutes to avoid sticking.
Once the fat has rendered down, remove the large pieces of meat with tongs.
Line a fine-mesh strainer with a few layers of paper towel, cheesecloth, or a coffee filter, and set it over a heatproof jug or bowl. Carefully pour the hot tallow through, letting it drip to remove any browned bits or sediment.
Pour into a jar, seal with a lid, let it cool down before storing in refrigerator.