**** fat is used as lard for making all sorts of things from rice to pastries. You could use beef fat (tallow) for adding flavor to some dishes as you suggested, or for greasing pans for cooking. It just needs to fit the flavor profile of the dish. Flavoring and adds fat for satiety. Also, sautéing onions come to mind, roasting potatoes, probably other veggies too. If the fat is rendered very well you can use it for making pastry dough and biscuits. Making soap as you mentioned. Making candles. When I cook a steak I often trim the fat, but I use it in the pan to grease the pan rather than adding oil to the pan. I let it heat up and liquify a little before adding the steak. I sometimes season some of it and let it cook until done, my husband likes the fat, but I do wind up throwing away some of the solid fat. The only negative thing is beef fat is very unhealthy according to current science.