Palm has been my nemesis for the entire time I’ve been making soap. For recipes I’ve experimented with, it behaves perfectly well when the palmitic + stearic is
< 27% of the fatty acids (high olive oil), gets fussier in the 28-30% palmitic + stearic range, and wants to race me to trace when the recipe has >30% palmitic + stearic. For fine swirled designs, I‘ve recently been using a recipe that has 30% palm and 10% cocoa butter (p+s is 28). I go very easy on the stick blending (a few seconds) and then hand stir to get a stable emulsion. I should also mention that I aim for having the starting batter temp at around 90F to avoid stearic spots and use a 40% lye concentration. Dropping the lye concentration as low as 33% has not changed the ornery behavior of the batter. On the upside, the recipe works really well for designs that need a medium trace
.
ETA: Zany”s recipe is 38% palmitic + stearic, which is mind boggling for me, but it doesn’t contain any castor. As I recall, Kevin Dunn, the author of Scientific Soapmaking found some evidence that castor causes acceleration in soaps made with palm oil. My recipes include 5% castor. Perhaps the absence of castor in Zany’s recipe makes all the difference. I hope the soap making goes well and you report back!