Okay I goofed up somewhere. Brewed following 1-2-3 (maybe why). Cracked one tonight. Quick dissolving head, very smooth and drinkable. Problem: carbonating with DME... smells and tastes slightly like rotten fruit... kinda like the smell of a wheat after a week in the primary. No vanilla flavor at all (3 1/2 oz). What am I doing wrong? I'm going to try this again with corn sugar to carbonate and much more vanilla!
Sounds to me like a bit of infection. Vanilla is a flavor that will dissipate with time. The more time in contact with the vanilla bean, the more intense flavor, but once that contact is no longer there, the flavor will immediately begin to dissipate.