October 20, 2021

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The accomplished food makers

How to make cold brew coffee: Experts weigh-in with great tips

7 min read



CNN
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Die-hard cold brew coffee fans know it’s wildly different from iced coffee, which can be made by simply pouring coffee over ice or refrigerating leftover coffee. Cold brew iced coffee, on the other hand, is the beloved liquid resulting from the process of slowly steeping coffee grounds in cold or room-temperature water for a number of hours, resulting in a silky smooth, less acidic and highly caffeinated coffee.

And though making cold brew may sound complicated, with the right process, it can be ultra simple. Ben Helfen, education support specialist at Counter Culture Coffee, says it comes with a flavor of its own.

“There’s a comfort level with the flavor of cold brew, which often tastes very similar, even with different coffees, so most folks have a good idea of what to expect, which isn’t as true with espresso or hot coffee,” he says.

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And then there’s the gear factor. “Espresso and hot concentrate poured over ice are more intimidating to the average consumer because they require brewing devices they might not have handy,” Helfen says. “Whereas, cold brew can easily be done in a Mason jar or French press.”

And when it comes to choosing specific coffee for cold brew, Trade Coffee director of coffee Maciej Kasperowicz says some roasts work better as cold brews.

“Because ultra-light roasts can be less soluble, it’s hard to extract all the good stuff out of those beans without hot water, so I wouldn’t go for those,” he says. “So, if you’re looking at, say, an East African coffee that features juicy citrus acidity and floral aromatics, those qualities have a hard time showing up in cold brew. It won’t taste bad, certainly, but if you’re buying specifically for cold brew, you might be better off buying a coffee that has a lot of chocolatey sweetness and a big body — qualities that cold brew brings out well.”

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There are a variety of cold brew makers on the market, but Helfen says that aside from convenience, these don’t necessarily create a better drink than the simpler methods. Some of the devices, such as a Toddy or Filtron, can make bigger batches, but he says, “I use what’s easy and cheap for making cold brew at home, which for me is usually just a Mason jar.”

Read on for Helfen’s easiest at-home cold brew primer.

  • Start with a 32-ounce wide-mouth Mason jar. Thoroughly clean and sanitize the mason jar, including the lid.

Ball Regular Mouth 32-Ounce Mason Jars with Lids and Bands, 2-Pack ($9.89; amazon.com)

Ball Regular Mouth 32-Ounces Mason Jar with Lids and Bands, 2-Pack

Ball Regular Mouth 32-Ounces Mason Jar with Lids and Bands, 2-Pack

Mason jars also give this process a more homey feel, if you’re into that vibe. And now that you have Mason jars, you can also make Mason jar ice cream.

  • Using a kitchen scale, measure 100 grams of coffee. Grind coffee to a medium grind (somewhere between table salt and coarse sea salt).

Baratza Encore Conical Burr Coffee Grinder ($169.95; amazon.com)

Baratza Encore Conical Burr Coffee Grinder

Baratza Encore Conical Burr Coffee Grinder

“A decent burr grinder makes any brew better,” Kasperowicz says. “The Baratza Encore is a favorite; it grinds evenly enough, plus Baratza is known for their customer service and parts program, so it’ll be easier to fix should something happen, instead of having to buy a new grinder.”

And to see more coffee grinder options, check out the best coffee grinders.

  • Heat a kettle to 160-170 degrees Fahrenheit or so, and, using a glass measuring cup, add 100 grams of this water. “Wetting the grounds a bit with hot water is sometimes referred to as a ‘hot bloom,’ Helfen says, which brings out the flavors of the coffee.
  • Using the measuring cup, add the rest of the water (700 grams) at room temperature, making sure the grounds are completely saturated (no dry pockets). Helfen insists on using filtered water for the best-tasting coffee.

Oxo Good Grips 4.23-Cup Pour Over Kettle ($53.96; walmart.com)

Oxo Good Grips 4.23-Cup Pour Over Kettle

Oxo Good Grips 4.23-Cup Pour Over Kettle

Serious baristas recommend a gooseneck kettle for home brews — this one’s also efficient for a pour-over drip method or a French press for hot coffee.

  • Tightly cover the Mason jar with plastic wrap to make sure there’s no air in the brewing environment. “I’m obsessive about putting off oxidation as long as possible,” Helfen says, to control the taste of the final brew.

Glad Cling Wrap Plastic Food Wrap, 4-Pack ($11.92, originally $14.99; amazon.com)

Glad Cling Wrap Plastic Food Wrap, 4-Pack

Glad Cling Wrap Plastic Food Wrap, 4-Pack

“Because of the longer brewing and holding times of cold brew, having super clean brewing equipment and keeping as much air out as possible will dramatically improve the flavor of the beverage,” says Helfen, who always wraps his Mason jar with plastic before replacing the lid. “Oxidation and bacterial growth are the enemies of cold brew!”

  • Put the lid on the Mason jar and refrigerate for 12-14 hours.
  • Retrieve the Mason jar and pour the contents slowly through a flat-bottom paper coffee filter into another receptacle (Helfen uses another 32-ounce Mason jar). Be patient: This process could take 15-20 minutes. Cold brew is a slow brew! If the first filter gets clogged with grounds, dispose of it and continue the filtration with a new filter. ‎

Melitta 8-12 cup Super Premium Coffee Filters ($2.29; target.com)

Melitta 8-12cup Super Premium Coffee Filters

Melitta 8-12cup Super Premium Coffee Filters

Any flat-bottom paper filter that fits your home automatic drip brewer will work for this process.

  • Once the brew is filtered, pour the desired amount into a glass, with an equal amount of water and ice. Enjoy!

You can also use a simple French press to make your own cold brew. “There’s no real need for complex machinery in cold brew making,” Kasperowicz says. “It’s one of the easiest methods to make in your home at a similar level to what you’d get at a coffee shop.”

Bodum Caffettiera French Press Coffee Maker, 12-Ounce ($16.91; amazon.com)

Bodum Caffettiera French Press Coffee Maker, 12-Ounce

Bodum Caffettiera French Press Coffee Maker, 12-Ounce

Kasperowicz loves this when he runs out of cold brew bags — or for just daily hot brewing.

Here’s his French press cold brew method:

  • Coarsely grind 3 ounces/85 grams of coffee.
  • Put the grounds into the French press.
  • Add 24 ounces/680 grams of water.
  • Cover without pressing the plunger.
  • Let brew at room temperature for 12 hours.
  • Plunge and pour out. Enjoy!

If you have a smaller French press, just use less coffee and water, while maintaining the same ratio (for example: 1.5 ounces/43 grams coffee and 12 ounces/340 grams of water), he advises.

Counter Culture Coffee, Apollo, 12-Ounce Whole Beans ($17; amazon.com)

Counter Culture Coffee, Apollo, 12 oz Whole Bean

Counter Culture Coffee, Apollo, 12 oz Whole Bean

“Most folks that I know that enjoy cold brew don’t particularly like some of the brightness or perceived acidity that lighter roasts can have,” Helfen says, pointing to his brand’s Apollo as his favorite for cold brew.

“Cold brew drinkers are usually looking for chocolatey and sweet flavors, and a little more developed roast can help with those flavors,” he says. “Apollo is available year-round, always has a washed Ethiopian coffee in it, and is more in the middle of a darker roast and a lighter roast. To me, it’s the best of both worlds — a little bit chocolatey and sweet, but also has some nice delicate floral and citrus flavors.”

Trade Cold Brew Bags ($9.50; drinktrade.com)

Trade Cold Brew Bags

Trade Cold Brew Bags

These are convenient for making cold brew at home — or wherever you’re parked right now — and are made from corn-based fiber and commercially compostable.

They also help filter some of the finer grinds, which a lot of cold brew enthusiasts like. “But if you’re fine with a little more silt, a French press absolutely does the trick,” Kasperowicz says. “And if you’re fine having a little more grit than that, just throwing grinds and cold water in any container and straining with a regular mesh strainer is A-OK as well.”

Hario V60 Drip Coffee Scale and Timer (starting at $60; amazon.com)

Hario V60 Drip Coffee Scale and Timer

Hario V60 Drip Coffee Scale and Timer

A kitchen scale, like this Hario specifically made for home brew drip coffee making, is key to the exact ratio of grounds to water.

Brita Grand 10-Cup BPA Free Water Pitcher (starting at $29.99; target.com)

Brita Grand 10-Cup BPA Free Water Pitcher

Brita Grand 10-Cup BPA Free Water Pitcher

“Always use filtered water for your coffee brewing! Hot or cold,” Helfen insists. “Even if it’s just a Brita pitcher or simple carbon filtration, it will improve the flavor of your coffee significantly.”

Taylor Precision Products Digital Pocket Thermometer (starting at $21; amazon.com)

Taylor Precision Products Digital Pocket Thermometer

Taylor Precision Products Digital Pocket Thermometer

Some people make cold brew without measuring the water, but the professionals insist the hot bloom is key to the process. “It highlights a little bit more brightness and more of the delicate flavors of a coffee,” Helfen says.

Five Star — Star San High Foaming Acid Brewing Sanitizer ($15; amazon.com)

Five Star — Star San High Foaming Acid Brewing Sanitizer

Five Star — Star San High Foaming Acid Brewing Sanitizer

Helfen says highly sanitized brewing equipment is key for the best-tasting results. He washes his Mason jar in soapy water, or if time permits, will boil it for 10 minutes, or deep clean it in a solution of this brewing sanitizer.

Once you’ve mastered cold brew, check out our guide to DIY whipped coffee.

Note: The prices above reflect the retailer’s listed prices at the time of publication.

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