Master Brewers Podcast Master Brewers Association of the Americas (MBAA)

Understanding a particular beer's fermentability—and how it changes over time—is a prerequisite to managing in-package conditioning. It’s not uncommon to observe some level of over-attenuation during refermentation, similar to how forced-fermentation tests frequently finish at a lower gravity than production fermentations. In order to reduce the risk of over-pressurization in package, it’s important for brewers to quantify the expected over-attenuation for each brand. Typically, and ideally, the over-attenuation is consistent and can be accurately accounted for within priming sugar calculations. However, this is not always the case—especially with dry-hopped beers. At Allagash Brewing Company, we created a model for our Sixteen Counties brand in order to predict and more accurately account for variable levels of over-attenuation in package due to hop creep.
Special Guest: Heather Muzzy Caron.
Sponsored By:
Hopsteiner: Proximity Malt: BSG: The Lupulin Exchange: Berkeley Yeast: cytiva: ProLeiT: Links:
Poster 65 - Case study: Modeling fermentation data to predict and prepare for dry hop creep during in-package conditioning — WBC Connect 9.19.20 Poster SessionWorld Brewing Congress 2024Upcoming Events - Master Brewers CalendarJoin Master Brewers

How a brewer who didn’t know the cost of his flagship beer, implemented a unit economic process that transformed the brewery from dry hopping to high gravity brewing.
Special Guest: Teddy Gowan.
Sponsored By:
Hopsteiner: Proximity Malt: BSG: The Lupulin Exchange: Berkeley Yeast: cytiva: ProLeiT: Links:
Breaking Down COGS for Long Term Brewery Success — District SoCal PresentationWorld Brewing Congress 2024Upcoming Events - Master Brewers CalendarJoin Master Brewers

The Guinness brewery was founded in 1759 by Arthur Guinness. The Guinness brewery group were early exponents of the advancements in microbiology, and particularly yeast husbandry that took place in Europe at the end of the 19th Century. This led Guinness to establish the Watling laboratory in 1901 and subsequent St James’s Gate yeast Library.


16 Guinness yeast isolates were taken from the St James’s Gate yeast library and sequenced using next generation whole genome sequencing. Using Single Nucleotide Polymorphism (SNP) analysis, the genetic lineage of the Guinness yeast were established, with the Guinness yeast forming a monophyletic group (all descendants of a common ancestor). Previous yeast studies have attributed geographical location to domestication; using this information the Guinness yeast were placed with yeast domesticated in the United Kingdom and the United States.


Within the 300+ yeast stored in the St James’s Gate yeast Library there are yeast from historical Irish Brewers. Using the same methods that established the genetic lineage of the Guinness yeast, 8 Irish brewing yeast were similarly assessed. In addition to the genotypic analysis of the Guinness and Irish yeast, the phenotype of the different yeasts were determined.


In this paper we present an understanding of the Guinness and Irish yeast from a genotypic and phenotypic perspective. This analysis established that despite the different brewing attributes of these Irish yeast they all have a common genetic ancestry which is different to that of the United Kingdom yeast and the United States yeast. Consequently, we suggest that there is potential scope for an Irish brewing terroir concept based upon brewing with Irish yeast.
Special Guest: Daniel Kerruish.
Sponsored By:
Hopsteiner: Proximity Malt: BSG: Precision Fermentation: The Lupulin Exchange: Berkeley Yeast: cytiva: ProLeiT: Links:
Presentation 12 - The Guinness Yeast and Irish Brewing Terroir — WBC Connect 9.29.20World Brewing Congress 2024Upcoming Events - Master Brewers CalendarJoin Master Brewers

What is Kernza and does it belong in your next recipe?
Special Guests: Alexandra Diemer , Harmonie Bettenhausen, Juan Medina Bielski, Tessa Peters, and Xiang Yin.
Sponsored By:
Hopsteiner: Proximity Malt: BSG: Precision Fermentation: The Lupulin Exchange: BSI: Grist: Berkeley Yeast: Chr. Hansen: Links:
Kernza® Perennial Grain — District Rocky Mountain PresentationKernza.org2022 AURI Value Chain Report — Supply chain, pilot studies, and various technical spec sheets for Kernza's performance and potential product utilization.World Brewing Congress 2024Upcoming Events - Master Brewers CalendarJoin Master Brewers

This is what happens when someone reaches out to suggest a great podcast topic. Becky Rudolf had questions about centrifuge operation so we mobilized a small army of Master Brewers members to provide answers.
Special Guests: Andrew Conlon, Becky Rudolf, Christopher Clausen, Louwrens Wildschut, Marco Garcia, Morgan Harry, Steven Lyerly, and Zach Kelly.
Sponsored By:
Hopsteiner: Proximity Malt: BSG: Precision Fermentation: The Lupulin Exchange: BSI: Grist: Berkeley Yeast: Chr. Hansen: Links:
In-line carbonation and centrifuge integration — Ask The BrewmastersCentrifuge and fruit — Ask The BrewmastersPost centrifuge filtration — Ask The BrewmastersHot side centrifuging — Ask The BrewmastersInlet Turbidity vs. Centrifuge Flowrate and Outlet Turbidity — Ask The BrewmastersCentrifuge Twice — Ask The BrewmastersHigh gravity beer centrifuge problem. — Ask The BrewmastersLoss percents through centrifuge — Ask The BrewmastersWorld Brewing Congress 2024Upcoming Events - Master Brewers CalendarJoin Master Brewers

We celebrate the first decade of craft malt by catching up with a few of its pioneers and talking about what craft malt can do for beer.
Special Guests: Andrea Stanley, Brent Manning, and Todd Olander.
Sponsored By:
Hopsteiner: Proximity Malt: BSG: Precision Fermentation: The Lupulin Exchange: BSI: Grist: Berkeley Yeast: Chr. Hansen: Links:
Craft Maltsters GuildWorld Brewing Congress 2024Upcoming Events - Master Brewers CalendarJoin Master Brewers