The Vanilla ball python is a incomplete dominant morph, like a pastel, with a regular and super form. It was first discovered by Gulf Coast Reptiles when they bred what appeared to be a light colored normal and were astute enough to realize that it was genetic . Unlike the typical normal, vanillas seem to lighten over time. Babies and adults have a pale or blushed head.
Unlike some other morphs used as highlighters, the vanilla has a super form that is an awesome morph in and of itself.
In combination, the vanilla enhances everything by making it brighter.
Here is a pic of a vanilla pastel I produced.
I have to say that I like them all, but my very favorite one has to be the combination of vanilla and fire, aka Vanilla Creme:
Next is a Super Vanilla Yellowbelly
Followed by a Super Vanilla Pastave
This is a Vanilla Lesser Pastel
A Vanilla Killerbee
And, I'll finish up with an Adult Super Vanilla Pastel
They have made a whole bunch of combos, but you get the idea.
Let me know if you have any other questions, or if I've missed something.