Communion Blessing?

Extraordinary Ministers (people who aren't deacons, priests, or bishops)
  may distribute Communion when there is a lack of ordinary ministers
and there is an unduly large number of communicants.

Photo found at veneremurcernui.wordpress.com

Can extraordinary ministers give blessings to those who cannot receive Holy Communion?

In short: No.

Fr. Z posted a statement from the Diocese of Madison, explaining the issue.

[Note: the author happened to get a MTS from a highly reputable university.]