What is IMBC cake frosting?

"IMBC" is not a standard abbreviation for a cake frosting. It's possible there's a misunderstanding or you're using a less common term.

To clarify, can you provide more context?

* What did you see IMBC referred to as? Was it a recipe, a blog post, or a conversation?

* What ingredients were mentioned in connection with IMBC?

Knowing more about where you encountered this term will help me figure out what kind of frosting you're asking about.