I was gifted with the rosette mould last year, tested it and it wasn't successful. For Chinese New Year, I thought I give it a go again and have to say I am getting the hang of how it works. I am happy with the results.
Recipe : https://mykitchen101en.com/how-to-make-thin-and-crispy-honeycomb-cookies-kuih-loyang-rosette-cookies/