I have come to the conclusion it is the one with the least amount of color to it. Right now, I'm trying Great Value "Light Tasting"Olive Oil. I've had EVOO and regular OO, but they make my colorants a bit funky. I used blue colorant and got a green soap. It's turning brown as it cures. The pomace oil is a chemical extraction process from what I've read. Don't know if that makes a difference in your choice.