Hi! I'm new here and new to soap making. So far, I love it! I have only done two small batches to begin the learning process, but I already want to try to add an oil or butter to make my soap more moisturizing. I would like to add cocoa butter to begin. Is it best to add cocoa butter to white base or can you use it with clear base, too? Also, I have a book with some interesting recipes. One calls for mashed banana added to shaved soap that has been melted. I'd love to try that one, but with the banana, would there be a spoilage issue?? Thanks for any input!