I made a large batch of MMF and wanted a nice taste of white chocolate. I melted the chocolate and kneaded it in but didn't get much chocolate taste so I added more. I think I added too much and now after sitting for a couple days, it is very firm. I know I can microwave it in order to roll it out but I'm concerned that after it is on the cake, it will get really firm again. Is there anyway to make it softer again? Maybe kneading in water? Maybe some crisco? If I leave it firm like it is and use it on a cake, will the texture be bad after it sits for awhile?