I made a giant cupcake today and piped rosettes on the top.  But my buttercream seemed too stiff and dry.  Couldn't get the rosettes to properly stick on the buttercreamed cake and they weren't smooth at all.  I made Indydebi's high heat buttercream which I need to since it's so darn warm here already.  I added in the 1/2 cup of whole milk.  Can I add more milk?   Is there something I'm doing wrong.

Any help would be greatly appreciated.

Thanks.

Just add more liquid.  Sometimes a person needs a little more or less liquid, just adjust it as you need it to get the consistency you want.

Thank you denetteb. 

You are welcome, hope it works out.