I believe it was made by Jiffy who also made various muffin mixes in those same little boxes.

I think i know what you are talking about. It is still made, it is called Betty Crocker Homestyle Frosting ( Fluffy White). It is my husband's favorite. I mostly find it at small town grocery stores like Piggly Wiggly and Ingles. You maybe be able to find it on Hard to Find grocer.

Betty Cocker had the cake frosting mixes in a box to match the cake mixes in a box. I remember My Mom made me cherry chip cake birthday cake with the matching cherry chip frosting. It wasn't ready to serve (like the canned stuff) you had add stuff to it.

I've been extremely saddened since the loss of this delicious cake frosting mix. The "Cherry Chip" frosting mix was sooooo good and the cherry chip cake is just not the same without the mix. Yeah, yeah, they have the gross TUBS of pre made stuff that tastes like a bunch of yukky preservatives. The Cherry chip cake with the cherry chip box frosting mix was truly a tradition in our family as so many of us loved it. I used to want that cake for my birthday all of the time and so does my brother in law. When ever I decided to make a cake, it would be the cherry chip. Sadly, we really have lost this beloved stuff!!!!!!!!