Question: How can I increase the lather and foam in a facial cleanser?

In this post, The Fawn writes: I currently have coco glucoside on hand and would like to make a facial cleanser for myself. But I find that with coco glucoside at 30% as the single surfactant, there’s very little bubble/lather and no foam at all. I am one of those people who wants LOTS of foam and lather if…