D Smith
This is the exact same recipe my mom shared with me when I was a newlywed (and believe me, I remembered how GOOD her pancakes were!) and I remember she got it off the side of a buttermilk carton waaaaaaay back in the 1950's.  I remember the name of the dairy company at that time was Terrace Park.  I think it was probably a brand local to my area (where I grew up) tho.  

These are the best pancakes I've ever tasted and I wouldn't change a thing.  We do sometimes make them on the griddle when I make a quadruple batch for my son and his family when they come for Sunday breakfast, but when it's just my husband and myself, I use one of my Wolfgang Puck Cafe Collection pans.  They are NOT the crummy non-stick kind so I fry them in butter.