Best cookies and cream you'll ever vape. Yes, Holy Vanilla is mandatory. If you substitute Holy Vanilla for another vanilla or vanilla combo, you will not get the amazing vanilla frosting created by using Holy Vanilla, Hazelnut, and Meringue. 5 day minimum steep, but tastes ok as a shake and vape and will get better with a week plus of aging. Notes and other reviews are here https://alltheflavors.com/recipes/11276#dunkaroos_by_goldbones