Ive had a piece of cake with it in when I went to Tenerife, it was a mystery ingredient and we had to guess what it was.
It didn't have any effect on me, (perhaps in was a drug free variety)
http://ukcsc.co.uk/taste-freedom/It was just like having lavender or sesame seeds added.
Not that impressive really.
Chocolate fudge cake or lemon drizzle cake is better.