248: This episode is nuts. Bob Slack and Justin Teff of Pulpit Rock Share Their Adjunct Experience
Jul 15, 2022
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Bob Slack and Justin Teff, co-head brewers of Pulpit Rock, discuss their process of achieving great results with adjunct-forward and barrel-aged beers. Topics include removing roasted barley, triple mashing, driving 'plushness' through low attenuation, toasting nuts and coconut, matching tank size to adjunct volume, using offbeat ingredients, and more. They also explore the creative process, barrel aging techniques, and infusing beer with adjuncts. The importance of balance and quality ingredients is emphasized.
Pulpit Rock Brewing focuses on achieving great results with adjunct-forward and barrel-aged beers by managing increased viscosity and extended barrel-aging times.
The brewery maximizes surface area and flavor extraction by matching tank size to the volume of adjuncts, using multiple rounds of maceration for certain ingredients, and toasting raw nuts and coconut immediately before maceration.
Pulpit Rock Brewing experiments with offbeat ingredients like granola and sheet cake, and pays attention to ingredient freshness and triple mashing with a focus on first runnings to drive 'plushness' through relatively low attenuation.
Deep dives
Building a Career in Craft Beer
Justin and Bob from Pulpit Rock Brewing share their journey into the craft beer industry. Justin's love for craft beer started in San Diego, where he discovered a wide variety of brews. He eventually moved back to Iowa and pursued a career in brewing. On the other hand, Bob's passion for beer began with Belgian styles and home brewing at a young age. Together, they founded Pulpit Rock Brewing in Decorah, Iowa.
Crafting Viscous and Flavorful Stouts
Pulpit Rock Brewing is known for their rich and viscous stouts. They have perfected their recipe over time, focusing on a fudgy and full-bodied base without excessive sweetness. They use a combination of dark specialty malts, such as chocolate malt and roasted barley. The team also pays attention to adjuncts, like nuts and coconut. They source raw nuts and roast them in-house for maximum flavor extraction. Cold extraction and multiple infusions in bright tanks allow for intense and well-balanced flavors in their stouts.
Exploring Adjuncts and Process for Flavorful Beers
Pulpit Rock Brewing experiments with various adjuncts to enhance their beers. Alongside nuts and coconut, they use coffee from a local roaster for their stouts. African coffees, particularly Ethiopian and Tanzanian, add unique flavors to the brews. While cinnamon is occasionally used, the team prefers a delicate touch to avoid overwhelming the beer. They also share their process of bagging adjuncts in the bright tanks for extraction, allowing for maximum surface area and flavor infusion. This approach requires careful planning, but the result is flavor-packed and exceptional beers.
Fermentation process for viscous stout
The brewery employs a clean fermentation process for their viscous stout, using USO5 or Chico yeast to achieve low ester levels. They don't use additional enzymes to boost fermentation at higher ABV, but rather pitch more yeast to ensure successful fermentation. They aim for a specific gravity range of 1060 to 1080, and once fermentation is complete, they cold crash the beer to clarify it.
Barrel aging and blending process
The brewery has noticed that as the viscosity of the beer increases, longer aging in barrels is needed to extract desired flavors. Initially, lower gravity beers were barrel-aged, but as they became more viscous, oxidation became less of a concern. They no longer top off the barrels and let evaporation contribute to the density of the final product. The brewery is expanding their barrel selection and exploring the use of barrels at different ages to create a diverse blending stock for their stouts.
Pulpit Rock co-head brewers Bob Slack and Justin Teff have built a reputation for creative “pastry” beers in both the stout and quick sour realms. In this episode, they discuss in depth their process for achieving great results with such adjunct-forward and barrel-aged beers, from managing increased viscosity and extended barrel-aging times, to their focus on ingredient freshness.
The conversation covers:
removing roasted barley from the base recipe and replacing with other malls to build more chocolate character
triple mashing with a focus on first runnings
driving “plushness” through relatively low attenuation
toasting raw nuts and coconut immediately before maceration to improve flavor
matching tank size to the volume of adjuncts rather than the volume of beer, to maximize surface area and extraction
employing multiple rounds of maceration for certain ingredients
adjunct addition horror stories
using offbeat ingredients like granola and sheet cake
and more.
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