coffee society journal — brew better
The fix for a watery iced latte is a double shot, cold milk, and a glass that's packed with ice before anything goes in. Most home versions go wrong because a single hot shot gets poured over a few cubes, melts them, and then gets lost in too much milk. Our recipe is 36 grams of espresso (a double shot), about 150 grams of cold whole milk, and a 12 ounce glass full of ice, and it tastes like coffee all the way to the bottom. Here's how to make it and which coffee holds up cold.
01why iced lattes go watery
Watery comes from melt, not from milk. Espresso leaves the machine at close to 200°F (93°C), and the first thing it does when it lands on ice is melt a good part of what it touches, so the shot is already diluted before the milk even arrives. Then a tall glass asks for a lot of milk to fill it, and a single shot can't carry 10 ounces of anything. A cafe gets around this with a double shot, milk straight from the fridge, and a glass that's mostly ice, which is why theirs tastes like coffee all the way down and yours can taste like cold milk with a little coffee in it.
02the recipe we use
Pull the shot into a small cup first, not straight onto the ice, and give it a ten second swirl with two or three cubes to knock the heat out. Then pour the milk over the ice in your glass, add the chilled espresso on top, and stir once. Pouring milk first and espresso last keeps the coffee from melting the ice on the way down, and it looks the way it does at the counter too. If you like it sweet, dissolve the sugar or syrup into the hot espresso before it cools, since it won't dissolve well once everything is cold.
03which coffee holds up cold
Cold mutes flavor. The same shot that tastes balanced hot can taste thin and a little sharp over ice, because cold turns down sweetness more than it turns down acidity, so a delicate washed coffee (one where the fruit is removed before drying, which gives a cleaner, lighter cup) can disappear in an iced latte. What holds up is body and chocolate. We pick the lots for our latte subscription with milk in mind, so they lean toward cocoa, brown sugar, and a heavier body, and those are the bags we reach for on hot afternoons here in Berkeley, CA. A natural Ethiopian (dried with the fruit still on the bean) is the other great choice, because blueberry and chocolate both read clearly through cold milk. If you don't own an espresso machine, a moka pot brew or a cold brew concentrate at about one to one with milk gets you most of the way there, and both are strong enough where drip coffee isn't.
04common questions
Use a double shot (36 grams of espresso), about 150 grams of cold milk, and a glass packed with ice before anything goes in. Cool the espresso for a few seconds in a separate cup so it doesn't melt the ice in your glass.
Not straight in, if you can avoid it. Swirl the shot with a couple of cubes in a separate cup for about ten seconds first, then pour it over the milk and ice, and the drink stays strong instead of diluted.
A medium roast with body and chocolate, like the lots in our latte sub, or a natural Ethiopian. Cold turns down sweetness, so light, delicate coffees tend to taste thin under cold milk.
coffee that holds up over ice
Our latte sub is picked for milk drinks, hot or cold. Every lot cups 85 or higher and is roasted to order in Berkeley and shipped within 24 hours.
latte sub cold brew vs flash brew milk science for better lattescoffee society · specialty micro roaster · berkeley, ca · est. 2023