It's all about Duncan Hines cake mixes today.
First up, here is an advertisement for white cake from 1954:
And one from 1956; that Blitz Torte looks pretty good to me!
This portion of an ad from 1964 shows the variety of mixes that were available at that time:
The next advertisement is from 1965 - sorry it looks so bad, it was on the back of a well-worn magazine:
This ad from 1967 features a photo of a Lady Baltimore Cake and a George Washington Cherry Cake, and also a recipe for Chocolate Cream Torte:
From 1968, "Cookies from a cake mix? Here's how!"
with a recipe for chocolate chip cookies:
And here's another one from 1968, with a recipe for Pineapple Upside Down Cake:
And yet another from '68, with yet another recipe:
Here's how their Classic Yellow Cake Mix looked in 2006:
And Spice Cake in 2006, with a recipe on the box for Old Fashioned Applesauce Spice Cake
And this is how they look "Now" , below in the next three photos which were all taken recently at the supermarket:
I think you'll agree that they still have quite a variety to choose from!