Products and flavors no longer available from Betty Crocker
As found in the 1966 Cake and Frosting Mix Cookbook.
Honey Spice (you can still get plain Spice)
Butter Brickle (now Butter Pecan)
Lemon Velvet (now just Lemon)
Lemon Chiffon (I think Chiffon cake went out with Nixon)
In fact, the only frosting mix you can still buy is Fluffy White. There are 21 flavors of canned frosting to choose from though.