One of the things that can really set a cocktail apart, and that has been a cornerstone of Proof's bar and cocktail list since we opened, is using fresh ingredients, high quality herbs, fresh squeezed juices, proper equipment, and when possible, house made mixers.
Dale DeGroff, widely credited with resurrecting the "classic cocktail," or credited with merely saving American from declaring "vodka and cran" our national drink, was one of the first bartenders (while at the Rainbow Room), to show love to the bar and espouse the above beliefs. He brought the respect given to food in the kitchen and threw it into the bar, really elevating American cocktails and inspiring many "mixologists" from whom I now draw my own inspiration.
Now, of course, when trying to make a lot of your mixers in-house, you run the risk of producing a really shitty cocktail.
At Proof, we make our own tonic syrup, which we combine to order with soda water in our cocktails ordered with tonic. It makes all the difference. (Of course, I don't want to reveal the recipe, but it makes for the most refreshing gin and tonic ever.)
We've also never used sour mix, opting instead to use fresh squeezed lemon juice and simple syrup - a small gesture that is really evident in the end product.
I read that Freeman's in NYC makes their sour mix with maple syrup and lemon juice - a combination I am anxious to try soon when we pour a Whiskey Sour for our Repeal! event.
To that end, I also recently uncovered a very easy recipe for house made grenadine from a bartender at Smith & Mills in NYC, and look forward to all the exciting uses it may hold in the future - not the least of which is a killer Rob Roy and Shirley Temple.