Experiment: Identical Brews with the Haze Gene Present or Absent

Removing just the haze gene, one brew was hazy, one wasn't. But did they taste different?

By Shana Solarte

Jun 3, 2024

In this tetrad test, panelists were instructed to find within their four-beer flights, which two beers per flight were hazy (those brewed with the haze-positive parent strain) and which two were not (those brewed with the hzy1∆ strain). Because this was a sensory panel that aimed to discover differences that also had a visual correlation, samples were served in opaque cups with lids to obscure tasters’ view of the samples. Truly blind, it required them to focus solely on the flavor and aroma differences.

NTU vs Strains v 6

NTU values of each standard strain sample compared to its hzy1∆ counterpart when used in a hazy IPA recipe for this experiment. Learn more about the basics of haze here.

Tetrad Test Results v 4

Sensory panel results. Flight order was randomized for each panelist. n=10

The results showed that our panelists could not ascertain which samples were hazy with any degree of certainty or repeatability. While some panelists did select the pairs correctly, the taster comments revealed that the correct answers may have been lucky guesses: one taster with a correct answer noted, honestly a guess,” while another correct taster commented, I’m having difficulty picking out similar beers.” Across the three panels, the theme of the comments was primarily that all four samples were incredibly similar. 

Hzy1 2

Results of a split batch. The base beer is an all-barley grist with 4lb/bbl dry hop. The sample on the left is fermented with OYL-011 hzy1∆ and the right is OYL-011.

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