Can you? If you do, should it be with royal or buttercream?

I've been researching and trying to find info but I just read something that said if I use Royal it will break down and fall off the cake.

GRRRRR....

Can someone please help. This would be so much easier if the bride would let me use fondant.

yep, it's possible. I just use all buttercream.

Yes, you can do brush embroidery - buttercream on buttercream. I've done it plenty of times.

Serious_Cakes has a good youtube on the technique. HTH.

You can also do royal icing on buttercream, if it's a crusting bc. I've done it, and the only problems I had was trying to "pull" the royal icing without messing up the buttercream. Must have VERY delicate touch.

I have only done it once and I was a ral amateur at the time. I did it and it looked great - can't seem to get it right now!!!!!!!!!! I would let the buttercream crust really well first! You will do a great job!