Swiss Miss Hot Cocoa Mix with Mini-Marshmallows box - Swiss Miss Playhouse - 1976-1980
One of the only completely intact boxes from this lot is this 1976 cocoa mix box. The copyright is 1976 though the offer on the box expires in 1980, so I'm guessing this one was actually on shelves in 1979.
How about that Swiss Miss house? Reminds me a bit of the General Mills Monster cereal castle.