Milk punch

Milk clarification is how a loud drink becomes clear without going thin. You curdle milk inside the punch on purpose. The curds carry off bitterness, color, and the rough edges. What is left is round, often silky, and stable enough to bottle, because the parts that spoil left with the curd. A mezcal drink with pineapple is one result: the smoke stays, the harsh edge goes, and the glass can look almost clear. That is an example of the method, not an assignment. This is not charcoal. The milk is the method. It is not the flavor in the glass.

The history

In 1688 William Sacheverell wrote of milk punch after visiting Iona. By then it was already domestic knowledge: made at home, in quantity, and kept. A contemporary of Aphra Behn had written, in the seventeenth century, about drinking her milk punch. Whether she invented it, the papers can’t say.

The oldest recipe we still have is Mary Rockett’s, an English housewife, in 1711. Brandy infused with lemon rind, water, sugar, lemon juice, and scalded milk, strained through a flannel bag. David Wondrich reprints it in Punch (2010). That book is what brought the drink back into bars. Her batch was measured in gallons. It was made to keep, in a century of harsh spirits and no icebox.

On 11 October 1763, leaving Boston, Benjamin Franklin wrote to James Bowdoin in Roxbury and enclosed “the Receipt you desired.” It is still in the Massachusetts Historical Society. Six quarts of brandy. The thin-cut rinds of forty-four lemons, steeped a day, then strained off. Water, four nutmegs, two quarts of lemon juice, two pounds of sugar. Boil three quarts of milk and add it hot. Stand two hours. Run it through a jelly bag until it is clear, and bottle it. The heat cooks some of the brightness. That was the point of the old method, and it is why the punch could travel.

The drink had a commercial life after that. Nathaniel Whisson’s milk punch was good enough that in 1838 his firm was named purveyor to Queen Victoria. After Charles Dickens died in 1870, bottles of milk punch were found in his cellar, and they were still good. The curd had already done the work of keeping. In 2014 Dave Arnold’s Liquid Intelligence put the physics next to the history: milk washing, agar, and the centrifuge. His bar, Existing Conditions, washes a spirit at about 250 ml of milk per litre, curdled with a 15% citric acid solution. The technique has not changed. The spirits have gotten better.

What the milk is doing

Citrus drops the milk’s pH and the casein collapses into curds. On the way down, those curds bind polyphenols — the bitter, astringent compounds in spirit, tea, and oak — and they trap color and suspended solids. Filter the curds out. What stays in the liquid is whey: a little protein and milk sugar. That is the silk, and it is why a milk-washed gin can foam when you shake it, almost like a weak egg white. You throw the curd out. You do not squeeze it. Squeezing puts the cloud back.

There are two milk punches, and only one of them is this. The English one is clear. You filter it, you can bottle it, and the milk is gone from the glass. The one New Orleans still serves at brunch is opaque: bourbon or brandy, sugar, cold milk, nutmeg. No curd, no bag. Both are worth drinking. If the glass is cloudy and white, you did not clarify anything.

Seven steps

1. 01

   Build the punch first

   Spirit, citrus, sweetener, juice, tea, or spice. Taste it. It should be clearly acidic and a little too intense. The wash will soften the edges, strip some color, and round it. Season the finished drink, not the punch you are about to wash.

2. 02

   Measure the milk

   Cold whole milk. One part milk to four parts punch is the start. The working range is 1:3 to 1:5. More milk is more silk and less flavor. The milk waits in its own container.

3. 03

   Punch into milk

   Pour the punch slowly into the milk, in one motion, without whisking. Never the reverse. Acid arriving gradually lets the casein move through the spirit and bind the bitter compounds before it collapses. Milk poured into acid curdles on contact, before it can do the work.

4. 04

   Rest it

   Leave it undisturbed, in the fridge, from thirty minutes to overnight, until the curds are defined and the whey looks translucent. A big tannic batch wants the longer rest. Mezcal and pineapple need less.

5. 05

   Strain twice

   First through cheesecloth or a fine cloth, to take the bulk of the curd. Then through a paper coffee filter. The curd bed that builds inside the filter is the finest filter you own. Let it form. Don’t rush it and don’t squeeze.

6. 06

   Pour the first runnings back

   The first liquid through is always cloudy. When it starts to run clear, move the filter over a clean container and pour those first runnings back through the curd bed. From there it should drip clear.

7. 07

   Bottle it

   The wash has taken the fat and most of the protein. Bottled and refrigerated, it holds far longer than the same drink made fresh. That stability is why the technique was invented, and why it suits a bar that wants a drink ready before the room fills.

Two drinks already in print

These are not the technique, and they are not your assignment. They are two published specs, so you can see the jobs on a real drink. The first is mezcal, pineapple, and chile. The second is a colada clarified with cream instead of milk. Franklin’s punch, below, is the historical control. The drink you wash is one you already like, or one you want.

Franklin, at a size you can actually make

What else the wash will take

Almost anything with acid and alcohol can be clarified. The question is what leaves. Tannin goes first, then color, then harshness. A spirit whose character lives somewhere else comes through. A spirit whose character is tannin comes through diminished.

• Mezcal. Smoke and roast survive. The raw hot edge does not. Pineapple is the pairing that already works: the fruit does the curdling, and the agave is still unmistakably there. Start with mezcal, pineapple, lime, and a whisper of chile.
• Unaged rum. Agricole and a clean white rum both take it. Color and harshness go. Funk and fruit stay. A clarified daiquiri — rum, lime, sugar — bottled and poured over one cube, is the plain version.
• Gin. The botanicals come through integrated rather than sharp. The whey left behind foams when you shake it. A clarified Saturn is the experiment: gin, passion fruit, falernum, orgeat, lemon. It looks like a stirred drink. It does not taste like one.
• Tea, in vodka or a light rum. Black tea infused into a spirit is usually too tannic to drink. The wash strips the grip and keeps the flavor. Dave Arnold’s Tee Time — tea, vodka, honey, lemon — is the one to learn first. A sweet-tea version is the same idea pointed at summer.
• Blanco tequila. It stays peppery and clean. Reposado and añejo lose some of the oak you paid for. Clarify the blanco, and let something else carry the warmth.
• Campari. The spectacular case. Most of the red leaves, and a great deal of the shout, and the orange and rhubarb stay. A negroni made with it is pale and quieter. No garnish theater. Let people guess.
• Brandy. This is what Rockett and Franklin were clarifying. Young brandy gets softer, and citrus and spice sit down in it. A very old cognac is wasted here. Its nuance is exactly what the curd takes.
• Bourbon, carefully. Oak tannin is most of what you bought. You will get a rounder whiskey and lose the barrel. The exception is a hot young whiskey you mean to tame, in a punch that already has tea and lemon, where losing tannin is the point.

Directions, not menu items

Five places to take a batch once the control tastes right. Each one changes one idea. Write the spec down before the night lies to you.

• One place, one change. Take a clarified drink that already works. Mezcal and pineapple is a useful one. Change only the sweetener toward a real place: sorghum and a pinch of smoked salt, if that place is mountain country. The spirit stays. The sugar is what becomes local. Don’t name it after a town unless the change is real.
• Tee Time, southern. Tea-infused vodka or blanco rum, lemon, honey, washed until it is water-clear. It should taste like the idea of sweet tea, not a glass of it.
• The quiet negroni. Milk-washed Campari, gin, sweet vermouth. Pale gold. The bitterness is a statement instead of a shout. For the guest who thinks they don’t like a negroni.
• A clarified espresso martini. Coffee flavor, none of the murk, and a drink you can bottle and pour to order. The wash is doing the work the shake usually does with the crema. Taste it. If the coffee left, you washed too hard or the coffee was weak.
• The Saturn, clarified. Gin, passion fruit, falernum, orgeat, lemon. Tiki flavors in a clear, cold glass. The contrast between how it looks and how it tastes is the whole idea. If it only looks clever, it failed.

Watch the hands

The videos are other people’s work. Watch them for the handling, not as a script to obey.

When you can’t use milk

Agar is the other way to a clear juice, and it is not a milk punch. Whisk about 1 gram of agar into 100 grams of the liquid, bring it fully to a boil, pour it shallow, and let it set. Cut the gel and let it weep through a cloth in the fridge. Pressing it clouds it. A centrifuge spins the solids out. You don’t need one. Don’t use either and then call the drink a milk punch.

Further, if you want the papers rather than another recipe: SevenFifty Daily on the science, Arnold’s Liquid Intelligence, and Wondrich’s Punch. The recipes above stay credited to the people who published them.