My mother introduced me to this recipe back in the early '60s, soon after Frank and I married. At that time, the only place we knew to get it was in a little folded round paper glued to the top of Eagle Brand sweetened condensed milk cans. For years, I had several copies of these little treasures, but now I can't find even one. However . . . the Internet is miraculous! I found the recipe in lots of places, but I'll give the credit to Borden's Eagle Brand.