I am using the base recipe approach, but still struggling with too many bases until I decide what I like. My recipes for 100% OO and salt bars are settled. I also have a 60% lard base recipe with 15% CO, 5% castor and the rest as high oleics of choice or on hand. I can vary it further by subbing in a small amount of a speciality oil for a bit of the high oleic oil. But then, having recently made an 80% lard and 20% CO soap for Szaza's lard replacement test, I realized that I may prefer 20% CO
. The recipe works well for swirls at the emulsion stage, but it's easy enough to take it to a light or medium trace through some combination of SB'ing, higher soaping temp or by adding an accelerating FO. I also have a recipe that is high in soft oils, with 15-20% PO, that pours well for thin layers. It's very nice after a few months of curing, but soft early on. I may have stumbled my way to a nice palm and high oleic recipe when I made pumpkin soap, but maybe I like it because of the pumpkin puree and clay I added. The recipe will need more testing if I decide to keep palm as a base. I'm still working on butters and high oleics or some combo. The goal is to have lard-free recipes that behave well and that I like as much as the lard base. The "like as much" part is an especially tall order. The palm free recipes I've made with butters (30-40%) and high oleics (40-50%) are promising after a cure of a few months, but they are "speciality soaps" in my mind due to the costs of the butters.
I've made progress, but think I still have some months to go before I have the base recipes narrowed down for further refinement and, yes, evolution! I also want to try beeswax and soy at some point, but there doesn't seem to ever be enough time.