Botanical spirit blending

Botanical spirit blending — compounding, in the trade — is making a flavoured spirit by putting botanicals into a neutral base and taking them out again. That is genuinely the whole process. No heat, no apparatus, no transformation: the alcohol is already made, and you are extracting aromatics into it.

It is worth being clear that this is not a lesser version of distilling. Compound gin is a legitimate and widely produced category, a great deal of commercial gin involves compounding at some stage, and the flavour decisions are identical either way. What distillation adds is a different extraction and the ability to leave things behind; what compounding gives you is every one of those decisions, today, for the price of a bottle.

And the decisions are the craft. Juniper is what makes gin gin — legally as well as in flavour — and everything after it is a balance between citrus, spice, root and floral. The commonest beginner instinct is to use twelve botanicals because commercial gins list twelve; the commonest useful advice is to use four and learn what each one does.

First bottle, all in

About £25

Equipment needed

A jar and a sieve

Time to a finished gin

A day

Botanicals to start with

Four, not twelve

1. 1

   Step 1: Start with juniper alone

   One botanical, one jar, and taste it after a few hours. It will not be a good gin and it is the most useful batch you will make, because everything you add later is measured against knowing what juniper on its own does.

   You will know it worked when: A reference point.

2. 2

   Step 2: Weigh everything and write it down

   Grams, and the time. This is the difference between a hobby and a series of accidents — the first gin you genuinely like is worthless if you cannot make it again.

   You will know it worked when: A recipe rather than a memory.

3. 3

   Step 3: Add three more botanicals, not eleven

   Coriander, angelica and one citrus peel is a complete classical gin. Twelve botanicals is how commercial gins are marketed, not how you learn what any of them contribute.

   You will know it worked when: A gin with a structure you chose.

4. 4

   Step 4: Taste as it steeps, and stop early

   Take a spoonful every few hours. Most botanicals give their best in four to twenty-four hours and turn bitter or medicinal after that — citrus peel and juniper both go wrong if left for days. Over-steeping is the commonest failure and it is entirely avoidable by tasting.

   You will know it worked when: A gin caught at the right moment.

5. 5

   Step 5: Strain properly, twice

   Through a sieve, then through muslin. Fine sediment keeps extracting and makes the gin cloudy and increasingly bitter in the bottle.

   You will know it worked when: A clear, stable spirit.

6. 6

   Step 6: Split the batch and vary one thing

   Three small bottles, one variable changed in each. This is how you learn faster than anybody following recipes, and it costs nothing extra.

   You will know it worked when: Comparisons rather than opinions.

• A neutral base spirit — Vodka, essentially — a clean spirit at 37.5–40% ABV. £14–£22 for 70cl. It carries everything else, so a harsh base makes a harsh gin, but the difference between mid-range and premium is much smaller here than the price gap suggests, because you are about to put juniper in it.
• Juniper berries — the one that is not optional — What makes gin gin, in flavour and in law: the category is defined by a predominant juniper character. £3–£5 buys far more than you need. Crush lightly rather than grinding, because grinding releases resin and bitterness rather than aroma.
• Coriander seed — the usual second — The most common companion in commercial gin. Citrusy and slightly spicy, and it bridges juniper to everything else. Whole seed, lightly crushed.
• Angelica root — the one nobody explains — It contributes an earthy dryness and, more usefully, holds the other aromas together so a gin does not smell like separate ingredients. It is why gins with it taste finished. Use sparingly; it dominates quickly.
• Citrus peel — Fresh or dried, and the fastest route to a gin that tastes like yours. Only the coloured zest — the white pith is bitter and extracts quickly. Fresh peel gives brightness and dried gives depth.
• Spice, root and floral, chosen sparingly — Cardamom, orris, liquorice, cassia, lavender, rose. Each is worth adding one at a time, and each will take over if given the chance. Orris root is a fixative rather than a flavour, in the same way angelica is.
• Scales reading to 0.1g — £15–£25 and the single most useful purchase. Botanical quantities are small enough that a pinch is not a measurement, and without a record you cannot repeat a gin you liked.
• A jar, a sieve and muslin — The entire equipment list. A clean jar with a lid, something to strain through, and a funnel if you like your worktop.

This catalogue usually declines to teach technique, because most crafts turn on a continuously modulated force judged by feel and prose cannot carry that. Compounding is the exception: there is no hand skill anywhere in it. What there is instead is a small set of variables, each with a predictable effect, and knowing them is the difference between following recipes and designing a gin.

Everything you do is extraction — pulling aromatic compounds out of plant material and into alcohol — and it is governed by four things.

• Time — the one people get wrong — Extraction is fast at first and then keeps going. The aromatics you want come out early; the bitter, resinous and tannic compounds come out later. That is the whole reason over-steeping ruins a batch and why tasting hourly beats following a stated duration. Different botanicals have different windows, which is an argument for steeping some separately and combining afterwards.
• Surface area — the reason to crush lightly — More exposed surface extracts faster. Crushing juniper opens it up; grinding it turns a twelve-hour extraction into a two-hour one and pulls resin with it. This is why the advice is always "lightly", and why ground spices behave completely differently from whole ones.
• Alcohol strength — what gets extracted at all — Ethanol and water dissolve different things. Higher-strength spirit pulls more essential oils and resins; lower strength favours water-soluble compounds and sugars. At 40% you are in the middle, which is why it is the standard base. If you ever start from a higher-strength spirit and cut with water afterwards, you will get a noticeably different result from the same botanicals — and that is a technique rather than an accident.
• Temperature — leave it alone — Warmth speeds extraction and coarsens it, pulling harsher compounds alongside the good ones. Room temperature is right. Gentle warming is a way to rush a batch and it consistently costs you refinement, which is worth knowing mainly so you do not try it.

The practical technique that falls out of this is separate maceration: steep the botanicals with short windows apart from those with long ones, strain each at its own moment, and blend the results. It costs nothing but jars, it removes the compromise of a single steep, and it is how you stop losing citrus brightness while waiting for a root to give up its flavour.

Blending afterwards is also where the recording pays off. If each botanical is macerated separately, you can build a gin by volume from measured components rather than by rebuilding the whole batch — and you can change one thing without starting again.

The first stage is a single afternoon and it is genuinely complete: juniper, three companions, a taste every few hours, and a gin you made. Almost nothing else in this catalogue produces a finished, usable result that fast.

The second is control, and it is where scales earn their place. Weighing, recording, splitting a batch and changing one variable at a time — this converts a series of pleasant accidents into a practice, and it is the difference between people who make gin twice and people who keep making it.

After that it goes in two directions. Sideways, into aquavit, amari, vermouth and bitters, which are the same method against different traditions and where the botanical vocabulary really opens up. Or inwards, into a single style pursued properly — which sooner or later means meeting the cocktail side of the catalogue, because a gin is designed against what it will be drunk with. A few people go on to distilling proper, which is a professional path rather than a next step, and the home distilling page is honest about why.

Compounding needs no approval, because nothing is being distilled. You are buying a spirit on which duty has already been paid and putting things in it, which is not production of an alcoholic product in the sense the approval regime governs — and it is exactly why this is the route the home distilling page recommends.

The line worth knowing runs at selling. Making a flavoured spirit for yourself and giving somebody a bottle is one thing; producing it for sale brings duty, labelling and the relevant approvals into play, and that is a business rather than an extension of a hobby. If a gin you made starts being requested by enough people that money is mentioned, take advice before rather than after.

The other legal point is only a naming one. "Gin" and "London Dry" are defined categories with rules — juniper must be the predominant flavour, and London Dry additionally restricts what may be added and when. Nothing stops you calling your own bottle whatever you like at home. It matters if you ever sell it, and it is worth knowing that a compounded spirit cannot be called London Dry however good it is.

• Classical London-style gin — Juniper-forward, dry, built on coriander and angelica. The reference point, and the thing worth being able to make well before departing from it.
• Contemporary and floral gins — Juniper present but not dominant, built around citrus, rose, cucumber or tea. Where most modern commercial gin sits and where experimentation is easiest.
• Sloe gin and fruit liqueurs — Fruit and sugar, steeped for months rather than hours. Seasonal, forgiving, and the traditional British version of this craft.
• Aquavit, absinthe-style and amari — The same method with entirely different botanical traditions — caraway and dill, wormwood and anise, or the bitter-root complexity of an amaro.
• Vermouth and aromatised wines — A wine base rather than a spirit, fortified and aromatised. A related craft with a different chemistry and a shorter shelf life.
• Bitters — Very high extraction, very small quantities, used by the dash. The most concentrated expression of the same skill and a natural companion to cocktail making.