Ok, hope I am posting in the right place....
I am guessing these were around in the mid 80s. They were granola bars on the inside and the outside was totally covered with "yogurt". I think they came in strawberry and blueberry. The 'stuff' on the outside was almost as thick as the bar inside and was quite creamy with a tinge of that 'sour' yogurt flavor. I want to say they were more chewy than crunchy and I am thinking maybe they were made by a company that made yogurt, not granola. The insides were almost similar to rice crispy.
In my search for these, I have found some bars that have this 'stuff' on the bottom but not totally enrobed like the ones from my past. I have also seen bars that have yogurt chunks in them but again, not what I remember. I am guessing I will not be able to find a box of them (unless it's VERY expired) but at this point, I just wanna know what they were called!