I have a wedding cake due on New Years Day. The bride wants roses covering the cake... My question is can I mix royal icing & buttercream together so the roses harden more than buttercream alone but not floral concrete like royal icing alone? Does my question even make sense?? Please help ASAP - need to start the roses today. TIA!

Has anyone mixed royal & buttercream icing? If so what were the results?

I have never done this, but I don't think you can. The fat in the buttercream will break down the royal. I think.

I was afraid that would be the response... But figured asking in advance instead of trial & error would be the best path... Guess she's going to get some royal icing roses! Thanks for the response!

I've never done it myself, but I've read on here that you can just let your crusting buttercream set up and they will stiffen for you. Then put them on your cake if it's easier for you to handle that way. I know there are posts on here someplace about it.

For a softer Royal icing add a few tsp. of plain powdered geletin.