That's what I was trying to do when I made this soap... Didn't turn out near as well as that one. https://www.soapmakingforum.com/threads/cut-holly-jolly-soap.73172/
Holly's soaps are amazing. Every time I try to repeat something from a video like that it always ends up looking like a Pinterest fail I'm going to try that rimmed soap from her YouTube later this week. It will look crazy, I'm sure!