Is iced americano acidic compared with cold brew coffee?

Iced americano is made by pulling espresso at high temperature, then cooling and diluting it. Cold brew steeps grounds in cold water for about 8 to 12 hours for a mellow, low-acidity cup. Ice drip passes ice water through the grounds drop by drop, then ferments the liquid in the cold for several hours, giving a more delicate aroma.

Nitro cold brew injects nitrogen for dense bubbles and a beer-like texture. High heat breaks tannic acid into pyrogallic acid, which brings sourness and bitterness, so cold extraction tastes mellower. Mintel data shows US iced coffee sales rose 75% over a decade, and ice drip grew 338.9% from 2010 to 2015. Americano coffee proportions stay simple: espresso plus cold water.

Even though they are all iced coffee, cold brew, ice drip, nitro cold brew, and iced americano differ greatly in their extraction methods and flavor profiles. Cold brew steeps coffee grounds in cold water for about 8 to 12 hours, yielding a mellow, low-acidity cup; ice drip lets ice water pass through the coffee grounds drop by drop, followed by several to dozens of hours of refrigerated fermentation, producing a more delicate aroma. Nitro cold brew injects nitrogen to create dense bubbles and a beer-like texture. Iced americano, by contrast, is made by extracting espresso at high temperature, then cooling and diluting it. This article will outline the production processes, pros and cons, and market trends of these coffees, along with practical tips for making cold brew at home, while also recommending beans such as Front Street Indonesia Mandheling and Front Street Ethiopia Yirgacheffe.

Cold brew coffee (COLD BREW) is made by mixing cold water with coffee grounds and steeping them in a low-temperature environment for about 12 hours, with the grounds remaining in the liquid the whole time—logically similar to cold-brewed tea. Ice drip coffee (ICE DRIP) is different: ice water drips into the coffee grounds layer one drop at a time to complete extraction, after which the coffee liquid, free of grounds, is placed in a low-temperature environment to continue fermenting for several hours.

According to data from market research firm Mintel, iced coffee sales in the United States grew by 75% over the past decade. Specialty coffee brands such as Blue Bottle and Stumptown Coffee have adopted the cold brew process, and with Starbucks' large-scale promotion, cold brew coffee has gradually become a highly attractive category; among them, ice drip coffee saw sales growth of 338.9% between 2010 and 2015.

Although low-temperature extraction is slow, it has its own flavor advantages. High temperatures easily break down tannic acid in coffee into pyrogallic acid, bringing sourness and bitterness; by comparison, coffee extracted with cold water is mellower, which is why it is popular. Although cold brew coffee, iced americano, and ice drip coffee are all low-temperature products, their production processes and flavors differ greatly.

Cold Brew / Cold Brewed Coffee (COLD BREW)

Cold brew (cold-steeped) coffee, Cold Brew Coffee, is undoubtedly one of the most talked-about drink keywords worldwide this summer. The idea behind Cold Brew is similar to cold-brewed tea: a large amount of coffee grounds is directly steeped in cold water below 5°C and slowly extracted at low temperature for 8 to 12 hours, which is why it is also called ice-brewed coffee.

This cold-steeping method amplifies the coffee's various flavors and aromas while reducing acidity, making the taste cleaner and purer. Its hallmark is that the colder it is, the better it tastes—no dilution or ice needed, and it is still excellent. In the United States, mixing it with coconut water in equal proportions is also popular, bringing out a purer coffee sweetness, and each shop's proprietary recipe has its own merits.

Nitro Cold Brew Coffee (NITRO COLD BREW)

Injecting nitrogen into cold brew coffee creates fine bubbles that make nitro ice drip coffee look just like beer, which is why nitro coffee is also called "beer coffee." The bubbles not only make the coffee's texture smooth, so that drinking it feels as if cream has already been added, but many drinkers find it richer than ordinary cold brew, with a natural sweetness even without sugar. Innovations in craft and brewing have given iced coffee a new look.

Ice Drip Coffee (ICE DRIP)

The ice drip method uses an ice-water mixture below 5°C, letting the ice melt naturally while a valve controls the speed at which ice water drips into the coffee grounds. The ice water slowly dissolves the flavors from the coffee grounds, dripping out extraction liquid drop by drop; complete extraction takes about 2 to 8 hours. For a better taste, 12 to 48 hours of refrigerated fermentation is then required. Each extraction yields only a small amount (usually 30 to 60 ml), and without added ice it is extremely concentrated; if the coffee liquid is too strong, it can be diluted with ice to personal taste. Because the process is slow, ice drip coffee is relatively expensive, but its taste is excellent.

Pros: Using cold-water drip filtration, the coffee is 100% soaked and moistened, and the extracted coffee tastes smooth without sourness or astringency and does not upset the stomach. The beans best suited for making ice drip coffee are none other than dark-roasted Front Street Indonesia Mandheling and the refreshing Front Street Ethiopia Yirgacheffe.

Cons: The drip speed must be controlled; with a slow drip of seven drops per 10 seconds, the water and coffee grounds have a longer time to blend, so the coffee tastes fuller. If the drip is too fast, the flavor is too weak and water may accumulate and overflow; conversely, if too slow, the coffee will ferment, producing sourness and an alcoholic taste.

In an interview, U.S. barista champion Laila once said that compared with cold brew coffee, ice drip coffee has more aromatics and a more delicate and subtle taste.

Iced Americano (ICE AMERICANO)

Iced americano is extracted at high temperature by an espresso machine, after which the coffee liquid is poured over ice cubes and ice water is added according to personal preference; its flavor is similar to ordinary hot-extracted coffee, with the ice cubes and ice water serving only to cool and dilute it.

Japanese-style cold coffee

Japanese-style cold coffee is not ice drip coffee, but some people say it tastes even better than ice drip coffee, because they believe some special aroma molecules need heat to be extracted. The method is to place a cup containing ice cubes under the dripper when making pour-over coffee, directly cooling the pour-over extraction liquid. If you want to save time, it is also an option.

The taste of coffee extracted at low temperature changes according to factors such as the coffee's roast level, water amount, water temperature, drip speed, and grind size; the perfect ratio requires adjustment through time and experience. Low-temperature extracted coffee tastes mellow, with lower acidity and milder bitterness, and fermentation adds further layers, but it also tends to lose the special flavors that can only be released at high temperature, so the choice of bean variety and roast level also requires special consideration.

If you want to try making cold brew coffee at home, the "Cold brew" brothers Jan and Niclas teach everyone 4 simple tips: "First, don't believe the nonsense that coffee beans should be 'ground as coarse as possible'; about the coarseness of breadcrumbs is recommended, and adjust constantly according to the length of extraction time. Second, cold brewing takes about 12 to 24 hours, and 18 hours tastes best; if it is ice drip coffee, the extraction time is shorter, and it is enough to control the speed at roughly 1 drop of coffee per second. Third, you don't need 0°C ice water; filtered water below about 20°C is enough. Fourth, if it is cold brew coffee, then only the last step remains: filter out the coffee grounds. Drink up!"

As for which has a better flavor—cold brew, iced, or ice drip?

In fact, iced coffee is just hot coffee that has been cooled down, and its taste is far inferior to cold brew and ice drip. Both cold brew coffee and ice drip coffee are coffees extracted with cold water; compared with coffee extracted with hot water, they preserve the coffee's flavor and aroma to the greatest extent while softening acidity and bitterness, because coffee brewed with cold water does not easily oxidize, which also suppresses the appearance of sour and astringent tastes. (Note: the acidic fats in coffee are not easily dissolved by cold water.)

Whichever you prefer, in the hot summer, why not try making simple and delicious ice drip coffee at home?

The above content is compiled by CoffeeHunters, a coffee news website.