Sensory Training

Beer Taste Wheel (Can Be Downloaded on Beer Evaluation Page)

Since this beer blog’s main focus is the evaluation side of beer culture, I just realized I never posted anything on sensory training, and how one could do this at home on their own. I do want to say that in order to taste beer, you don’t need any special training, you already have all the tools you need with your eyes, nose, and tongue; you just need to listen to them and trust what you perceive. However,  it helps a great deal to take a BJCP course (or other course like it), and take the test to validate your skills, especially if you want to judge competitions. But all that aside, I have met people with no formal training who could identify flaws and evaluate beers like no other, and the other way around. However, if you want to hone your skills, practice, or simply learn exactly what Diacetyl tastes like in beer, or how oxidation tastes, you can doctor beers to help teach yourself what these flaws or beer attributes taste like.

In some cases, you already have an idea of what you are looking. For example if you have ever had microwave popcorn with butter flavor, you will have a idea of what Diacetyl is like. Diacetyl is butter flavor that is used in a lot of artificial butter microwave popcorn. If you have ever made a spit ball and chewed paper to get it wet, you have an idea of what flavor would be in the beer for a stale or oxidized beer. But the way the flavor or aroma interact with the beer and various other flavor components can throw you off a bit. So this is where this type of training really comes in handy, and you can do this at home by yourself, with some friends, or in a homebrew club.

When doing this doctored beer lab, I find that some newer people even have a hard time detecting any difference in the concentrations given. So don’t be afraid to bump some of them up a touch for your first time through. The idea is to be able to detect these levels, then over time you can reduce the amount used to see how low you can detect the difference. It is best to first do labs like this with a beer like Budweiser or Miller, basically a very neutral low flavor and aroma beer. You taste an undoctored sample side by side with one where you have put in an additive. As you progress, you can try to doctor other beers with more flavor and aroma to see how the flavor and aroma components interact and change with the stronger malt or hop flavor and aromas of other styles. Many people just stop at the Budweiser sampling when they get a feel for what “sour” is. I suggest at least doctoring a few more intense beers with the same concentration just to see if you can detect it.

Below is the recommendations for doctoring beer from the BJCP Exam Study Guide, this is a basic lab that covers the major flaws in beer. The BJCP also sells a sensory training kit, if you are interested you can buy one there http://www.bjcp.org.

Flavor Adulterant Quantity
Sour/Acidic (lactic) USP lactic acid 0.4 ml (1/3. tsp of solution of 1/8 tsp lactic acid plus 3/8 tsp distilled water)
Sour/Acidic (Vinegar/Acetobacter) White wine vinegar 3/4 tsp
Bitterness iso-hop extract 1 or 2 drops, to taste
Sweetness sucrose (table sugar) 1/4 tsp dissolved in 1/2 tsp water
Astringency Grape tannin 2 tsp. of solution of 1/8 tsp tannin dissolved in 5 Tbsp water
Phenolic Chloroseptic 0.4 ml (1/3. tsp of solution of 1/8 tsp Chloroseptic plus 3/8 tsp distilled water)
Clovelike Clove solution Make solution of 8 cloves soaked in 3 oz. of beer and add liquid to taste (about 4 tsp)
Sulfitic Potassium metabisulfite (Should not be tasted by persons with asthma or sulfite allergies.) Make solution of one tablet dissolved in 3 oz. of beer and add to taste (about 1/2 tsp)
Alcoholic Ethanol 2 tsp (increases alcohol by 2.7%). 3 tsp vodka may also be used
Sherry-like Dry sherry 3/4 tsp
Nutty Almond extract 0.1 ml (1/8 tsp of solution consisting of 1/8 tsp. almond extract plus 5/8 tsp. distilled water)
Papery/Stale N/A Open bottles to air, reseal, and keep at 100 F or warmer for several days (I like to pour the beer from the bottle into a sanitized bottle to give more air)
Winey White wine 2 Tbsp
Diacetyl Butter extract 4-5 drops
Estery Banana extract 6-7 drops
Lightstruck N/A Expose commercial beer in green or clear bottles to sunlight for 1-3 days.
DMS Juice From Can of Corn 1 ½  tsp of juice from a can of corn.

This is just the basics, you can use other additives to taste for different flavors, for example you could dry hop various hops to see the affect they would have on the beer. Get creative and you the possibilities are endless. For example, if one had the time, they could make small batches of beer without hops, that accentuate specific types of malt. You could also make a basic base beer with a light malt profile, and hop it with a single hop type to learn what type of bitterness, flavor, and aroma each hop adds to a beer.

For a lot more on this topic, I highly suggest Tasting Beer, by Randy Mosher or for even more advanced (and a much drier read) information, Evaluating Beer.  As always when relating to this subject, the BJCP website is a good source of information as well, and its free.

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