What is vivian favourite flavoure of cake?

I do not have access to personal information about people, including their favorite cake flavors. There is no way for me to know what Vivian's favorite cake flavor is.

To find out, you could:

* Ask Vivian directly! This is the easiest way to find out.

* Observe what kind of cake she orders or eats.

* See if she has mentioned her favorite cake flavor in conversation.