[masraum]

What sort of "appliance garage"? Its' part of one of the cabinets? Or it's a small drywall enclosed space? I assume the blender would be working behind a door of some sort?

My understanding of how sound suppression works is that it depends upon the frequency of the sound for what's best, but what's best is often multiple layers of dissimilar stuff (layer of heavy/dense stuff, layer of light stuff, etc... Can you make the walls and door heavy and thick (double or triple up wood thickness and density)? If you can double layer wood, maybe a thin layer of MLV in between? And in addition to that, I think you'd also want something like the egg crate to help break up the sound so it wasn't "reflected" by a large flat surface.

Got a pic of the "garage" that you're talking about?