I am new to royal icing. I have been told that grease breaks down the icing if it comes in contact with it. If I were to make a picture out of royal icing and place it on top of butter cream fosting, will it break down the royal icing and ruin the picture??

Thank you anyone. I have three days to make this cake.

Grease breaks down the icing if it gets in there while you are making the RI. If you do a RI piece and set it on the buttercream, it should be fine. I've done this before.

You should be fine with putting RI dry pieces on BC covered cakes. RI just can't come in contact with any grease or fat in the mixing or making process. Mixer blades, bowls, measuring spoon ect. must be free of any grease or oil. I prewash all of my equipment in a degreaser dish detergent before use. Other than that RI is fun to work with. Over the years I have put on RI flowers, painted bridal figurines, RI butterflies, scrolls and names on BC covered cakes. They held up fine! HTH
Hammy

I love RI. My favorite recipe is Antonia74's. It's awesome!