My first batch of tallow happened in October 2023. I bought a couple of pounds of suet from a local butcher to season a new cast iron pan and ended up with twice as much rendered fat as I needed. I left the extra in a mason jar on the counter, used it for a week of cooking, and noticed two things. My pan stopped sticking after one seasoning. My hands stopped cracking from washing it under cold water.
I started reading. Most of what I found online about tallow either treated it as a forgotten miracle or wrote it off as artery-clogging fat. The middle ground (what tallow actually is, how its fatty acid profile compares to other cooking fats, why it suits some uses better than others) was scattered across food science papers, old farm bulletins, and a handful of forum threads. I kept notes on what was solid, what was hand-wavy, and what nobody had bothered to test.
By mid-2024 I had a folder of test batches. Rendering methods, balm formulations, comparisons against ghee and lard, a soap that came out chalky on the first try and great on the third. King Tallow went live in September 2024 as a place to put all of it in one URL so I could stop linking my friends to the same Google Doc.