Cold brew may have reached its height as a mainstream trend with Starbucks announcing the launch of cold brew in more than 2,800 stores in North America. Cold brew is prepared differently from iced coffee, as it鈥檚 brewed in cold water and takes 12-24 hours to pull all the coffee flavor from the roasted beans. All that brewing time really pays off 鈥 cold brew lacks iced coffee鈥檚 sharpness, plus it鈥檚 richer, mellower and less acidic. While cold brew is quickly rising in popularity, the Pacific Northwest鈥檚 brew-tiques already have moved on to the next level of cold brew indulgence: nitro coffee.

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Bon App茅tit鈥檚 restaurant editor and food critic Andrew Knowlton聽has already predicted it will be one of 2015鈥檚 food trends. Portland鈥檚 Stumptown Coffee Roasters is arguably the first agent to develop this new technique to brew a glass of the refreshing buzz-maker, and they鈥檝e been doing it for years.

So what is this nitro coffee? It鈥檚 a cold brew infused with nitrogen. Just think about that glass of nitro Guinness stout you had on St. Patty鈥檚 Day. Nitro Guinness is super smooth, creamy and velvety, just like nitro coffee. When a barista pours you a glass, you can see the bubbles cascading down the side of glass.

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Where can we get a glass of this trendy drink? We鈥檝e spotted the beverage on the menus of San Francisco鈥檚 Coffee Bar and in Seattle鈥檚 Anchors Down, in Ballard. Cuvee Coffee in Austin, Texas has its own nitro cold-brew product line called Black + Blue. And of course, Stumptown in Portland and LA carry nitro coffee.

Have you tried nitro coffee? Let us know if you find it in your town, and tell us how you like it.

(Photos via SFWeekly, @stumptowncoffee)