Taste Development during the Run
So, let’s follow up on the first post on gin. Taste, in a gin, pretty much follows in the footsteps of making brandy, whiskey or rum. Fruity notes at the beginning, body in the middle, root-like, nutty tastes at the end of the run. Weird, because we normally work with GNS, when making gin, so there shouldn’t be “real” heads and tails, right? Right, but the molecules, associated with certain tastes, still follow the same rules. Fruity at the beginning, root-like at the end. Lime, lemon, orange peel come over early. Rooty and nutty herbs come over near the end. And if you want multi-dimensionality, a complex gin, you need both.
It even gets more funny. Or interesting. Not only does the gin develop in taste as a whiskey or rum or brandy would … even though you may use GNS to make your gin, you still need cuts. Cuts on a gin? Yes! A sorta Fores/Heads cut and a sorta Tails cut.
Tails cut is easy. It is when you stop the run, because the later parts of the run just bring too much root-like tastes over (and they easily overpower the fruitiness of the beginning of the run). But a “Fores/Heads cut”? Yes, you need it. A small one. Only like 0.5 liters on a 250 liter charge. Maybe a liter in a 500 liter boiler charge of gin. The first (half a) liter. Why? This contains the very oily, excessive and harsh first juniper oils. You want to cut them out.
I’ll try to find a picture and add it to this thread. So you can see how these first juniper oils, that you want to cut out, look like. Really remarkable. A bubble of haze in a pint of alcohol. Not nice. Toss it. I can’t find pics right now, but I’ll dive in later. Important that you see it, so you can recognize it.
All right, so how can we use cuts to perfect our gin? Well, if you are not satisfied with the amount of back of throat taste / root-like tastes … you could cut a bit later, allowing for more nutty flavors to come over. Or if you feel you need a little less fruity notes … well, you can dial the amount of fruit peel back … or you can take a slightly larger “Fores/Heads cut”. I am not saying one solution is better than the other, I am just informing you that by “gin cutting” you have an additional tool to perfect your gin runs.
Something else you can use. If you make rum or brandy or whiskey, you can do a swift stripping run. Fast, low alcohol purity, lots of tastes blending in all over the place. Just so you get the picture: faster strips make for dirtier smearing of heads and tails into hearts.
Same technique you can use with gin making. You don’t strip, but you can vary power inputs on your distilling machine. If you go for higher energy inputs and higher output figures per liter, you will increase vapor speeds inside your column. High vapor speeds translate to more of the Tails oriented tastes to come over earlier. And they may be overpowering.
The solution? Just throttle down and you will find the outcome less root-like, less nutty oriented. More florals coming over.
Play with it: power settings. If you go too fast, taste becomes flat, one dimensional. Tune it down (by power management) and within just a few seconds, you may find the taste appealing again. Multi-faceted, interesting, complex. Playing with energy input, speed of run, and vapor speeds does not only allow you to make better tasting gin (lower speeds for better gin), it also allows you to go deeper into the Tails oriented department without the associated tastes becoming too overpowering. In other words: you can use more of the GNS to actually make more great tasting gin. End temperature based on gas temperature entering the column? Between 94.5 and 96 degrees C. The slower you go, on the last part of the run, the deeper you can go, without compromising on overal taste.
Next? Lets dive into louched gins in the next post. Are they a failure … or maybe a sign of actual distilling success? I’ll try to find some time and dive in tomorrow or the day after. For after the weekend? A take on boiler vs. vapor infused gins! I know there’s lots of opinions. I won’t try to take sides, I will try to explain the pro’s and con’s.
Chris and Ashley enjoying their New World Distillery Gin in Utah …