Guide

How to batch cocktails for a party (the maths, and what not to batch)

Scale any cocktail spec to a bottle or a pitcher, add the right amount of water, and know which drinks fall apart when you try.

By Travis Rudisill · September 7, 2026

The reason to batch is the one thing every hosting thread on r/cocktails eventually says: so you can actually entertain. Making twelve Margaritas one at a time is a job. Pouring twelve from a bottle is a party. The maths is easy; the part people get wrong is water.

Step 1: multiply everything

Take the spec and multiply every line by the number of servings. That’s it. A Margarita is 2 oz tequila, 1 oz lime, ¾ oz Cointreau. For twelve:

45 oz is about 1.33 litres, which is a comfortable pitcher or two wine bottles. The ratio hasn’t changed, which is why it helps to have it written in the corner of the card.

A quick reference for the multiplications that come up most:

Dashes of bitters don’t scale cleanly: two dashes is roughly 1/16 oz (about 2 ml), so for twelve drinks use about ¾ oz of bitters, or 24 dashes, and taste.

Step 2: decide how it’ll be served, then deal with water

When you stir or shake a cocktail with ice, the ice melts into it. That dilution is about 20 to 25 percent of the final drink, and it’s not optional: an undiluted Manhattan is harsh and hot. When you batch, you have to decide where that water comes from.

Option A: stir or shake each glass. Pour the batch into a mixing glass or shaker with ice, stir or shake as usual, strain. The batch is just a way to skip measuring. Don’t add water. This is the right choice for stirred drinks served up when you want them cold and perfect and you don’t mind 30 seconds per glass.

Option B: pre-dilute and pour straight. Add water to the batch, chill it hard, and pour it straight into glasses. Nobody shakes anything. This is how bars do it and how a host gets to sit down.

For Option B, add about 20 percent of the batch volume as water. For the 45 oz of Margarita above, that’s 9 oz of water, for a 54 oz batch. Chill the bottle in the fridge for stirred drinks, or the freezer for high-proof stirred drinks (a batched Negroni or Manhattan in the freezer won’t freeze, and pours beautifully thick and cold).

Shaken drinks pre-diluted this way lack the aeration and the ice chips. They’re still good. If you want the texture, use Option A for shaken drinks and Option B for stirred.

Option C: pour over ice. Batch without water, pour over ice in the glass, and let the ice do the dilution as the guest drinks. Works well for rocks drinks and long drinks. Warn people it starts strong.

Step 3: the citrus rule

Batch everything except the citrus the day before. Lime and lemon juice go dull within hours, and a sour made with yesterday’s juice tastes flat in a way guests can’t name but notice. On the day, squeeze, measure, and stir it in. If that’s not possible, the day before is survivable; the week before is not.

What batches well

• Stirred, spirit-forward drinks: Negroni, Manhattan, Boulevardier, Old Fashioned. These are the best candidates. Pre-dilute, freezer, pour. Add the garnish per glass.
• Sours without egg: Daiquiri, Margarita, Gimlet. Batch the spirit and sweetener ahead, add citrus on the day, shake per glass or pre-dilute.
• Long drinks: Tom Collins. Batch the sour part; pour over ice and top with soda per glass.

What doesn’t

• Egg white. The foam has to be shaken per drink. Batch the rest; add the egg and shake each.
• Mint and muddled anything. A Mojito batch turns into swamp water in an hour. Batch the rum, lime, and syrup; press the mint in each glass.
• Anything sparkling. Never batch the soda or the wine. Top each glass.
• Drinks that depend on the shake. A Whiskey Sour served up is mostly texture. Pre-diluted, it’s a fine drink and a different one.

Write the batch on the card

Every card on this site has room on the back. Write the ×8 or ×12 version there, with the water line, so you don’t redo the arithmetic next time. A batch you’ve made once and liked is a recipe in its own right, and it’s the one you’ll want the day before the next party when you can’t remember whether it was 8 or 9 oz of water.