The recipe for these came from the "Better Homes" cookbook from umpteen years ago that mom always uses. (I would've used Alton Brown's, but I'm not crazy about yogurt.)
I did use a couple of hints from AB, however. I tossed the blueberries with a spoonful of the dry team & let the finished products cool on a tea towel (albeit, also on a rack).
I had one a few minutes later & they're wonderful! The recipe made 12 total, but I left two without blueberries for my dad, who prefers plain muffins with jam/jelly on them.