The part I am rendering is the soft and hard fat of the brisket. The hard fat on a brisket is called deckle, because the brisket lays flat. Most of the time tallow is usually found around the organs but the deckle makes pretty good tallow too. You can make candles from tallow. The tallow candles were one of the cheapest ones to buy. They would melt on a hot day without being lit sometimes. I am going to jar this rendered beef fat for future recipes, especially cooking some potatoes, rice, or cauliflower with.