398: River North Explores the Outer Limits of High ABV Brewing

Over the past few years, Denver's River North Brewery has collected accolades from top beer competitions around the world—four GABF medals, four World Beer Cup medals, four European Beer Star medals just to name a few—and beers like Father Time and Anniversary 11 have earned top scores from our blind panel. They most recently earned midsize brewery of the year honors at the inaugural Colorado Brewers Cup. While they brew a wide range of beers, including frequent medal winner Nightmare Fuel coffee stout, they're probably most well-known for the beers that push into the peaks of the ABV range—stouts, Belgian-style strong ales, and barleywines that regularly hit 15% and higher. In this episode, founder Matt Hess and head brewer Matt Malloy share their techniques for making beers that not only turn heads for the their sky-high numbers, but also remain drinkable and as balanced as such beers could be. From controlling fusel alcohols through careful fermentation management, to building layers of flavors through malt selection, they share insights garnered from ten years of pushing the envelope. In this episode, they touch on: using very high pitch rates and over-oxygenation to maintain healthy yeast employing dehusked malts to soften roast character in big stouts pushing yeast into an additional growth phase to increase cell count keeping osmotic pressure low and feeding fermentations selecting and adding coffee into stout managing the oxidative process in barrel aging And more. This episode is brought to you by: G&D Chillers (https://gdchillers.com): G&D Chillers Elite 290 Micro-series line utilizes a natural refrigerant, features a more compact design with variable speed fans, and offers near-zero global warming potential. The future of sustainable refrigeration is here! Learn more about G&D’s Elite 290 line and visit GDCHILLERS.COM. Berkeley Yeast (https://berkeleyyeast.com). Stop worrying about diacetyl with Berkeley Yeast’s line of Fresh™ strains. These revolutionary yeast strains are engineered to produce the ALDC enzyme inside the cell, preventing diacetyl before it forms. That means no more lengthy diacetyl rests—just clean, crisp beer that’s ready for packaging sooner. Learn more at berkeleyyeast.com/fresh. Old Orchard (https://www.oldorchard.com/brewer): As breweries expand beyond beer into other segments like mocktails and CBD beverages, Old Orchard is here to help. Whether trending flavor additions or nostalgic favorites, the next best thing is around the corner at Old Orchard. More information and free samples are waiting at oldorchard.com/brewer Indie Hops (https://indiehops.com) Strata, Indie’s original hop release, is now available in cold-side flowable hop oil form—Strata HyperBoost—in coordination with Yakima Chief Hops. Indie Hops T90 pellets establish the multi-layered Strata experience, while cryogenic CGX pellets in coordination with Crosby Hops, and now Strata HyperBoost with YCH expand the possibilities. Learn more about Strata and Indie’s more recent hop releases at www.indiehops.com. Ss Brewtech (https://www.ssbrewtech.com) Featuring a laser-welded cooling jacket for efficient and precise temperature control, an innovative silicone racking arm, and a carbonation stone that allows you to carbonate right in the fermenter, Unitank 2.0 is engineered to help you get the most out of your fermentations! Visit Ss Brewtech.com to learn more! Isuzu Trucks (https://www.isuzucv.com) Whether you are looking for a self-distribution solution or one to deliver supplies, there is an Isuzu truck that will fit your needs. Go to isuzucv.com to check out their impressive lineup or visit an Isuzu dealer today to find out why now, more than ever, Isuzu trucks are the trucks you trust for the work you do! Brewer's Retreat (https://brewersretreat.com) Tickets for the Craft Beer & Brewing 2025 Brewer’s Retreat in Asheville and Mills River, North Carolina are on sale now and going fast. Brew on homebrew systems with some of the most inspiring craft brewers in the U.S. Learn more and secure your tickets at brewersretreat.com