I ate a big piece of cake every day since last Sunday (5days) The frosting has a teaspoon of vanilla extract in it. I had to give an ETG test today. Is it going to be positive?

Unlikely... because that would be one teaspoon on the ENTIRE cakes icing... not one slice. THat cake sits...a lot of that evaporates over time.

Very minimal alcohol consumption if any.

Talk about stupid. The ETG is very sensitive I know. I am a couple of months shy of completing a 5 year monitoring program. I'm freaked out. I knew better but the cake won out. Talk online about how sensitive the ETG is and the cut off levels.