I had a St Germain cocktail for the very first time a year ago. It was a French 76 - gin, st germain, lemon juice and champagne. It was fantastic, and potent! I loved the floral of the St Germain, so I bought a bottle. And then I started seeing it EVERYWHERE! I guess I am cutting edge, no? Well, it is a very specific flavor and I am not always in the mood for it. But sometimes it is perfect. I decided to incorporate it into a martini.
I started with the following ratio:
3 oz Hendrick's gin
2 oz St Germain
1/4 oz vermouth
This was waaaaaay to sweet and syrupy. I cut it with another ounce of gin and it was much much better. I think even less St. Germain next time around would be better. Live and learn I guess!
Salud and Cheers!