I like to call craft-brewed beer a cerebral beverage. Based on all the flavors, variety and innovation going on today, it certainly gives beer lovers much to talk about. But therein lies the challenge…
In talking about flavor on a daily basis, I’ve searched high and low for a solid answer on what exactly flavor is, how the heck we perceive it, and more importantly, describe it.
Admittedly, as one on a flavor-finding journey, and ever a palate athlete in training—we train each bite people—the bottom line is flavors are often difficult to describe. There are a multitude of books on the very topic. A new one that relates directly to pairing is Beer, Food, and Flavor by Schuyler Schultz.
Schultz talks about tasting in terms of attack: primary, secondary and tertiary flavor characteristics, finish, balance and dimension. There’s also the stand-by bible Tasting Beer by Randy Mosher. For those who really want to geek out, read Neurogastronomy by Gordon Shepherd, or Sensory Evaluation Techniques by Morten Meilgaard, Gail Vance Civille and B. Thomas Carr.
Flavor = Taste + Aroma
In January, I attended a fantastic three-hour seminar presented by Ray Daniels and Nicole Erny of the Cicerone® Certification Program titled “Flavor & Tasting.” This is more of what the craft beer world needs to hear to help us understand and better describe flavors.
Daniels emphasized right out of the gates that flavor = taste + aroma. Sit with that one for a moment while I share it again. Flavor = taste + aroma. I often liken a new taster’s experience to being blind, with no reference to the primary colors. In this scenario, primary colors are flavors elements like sweet, salt, sour and bitter. On my beer journey, it took a while to mentally detect and separate these elements. Until a taster has reference to what they perceive, they have a hard time describing (internally or externally) what flavors they’re detecting.
For example, here is a recent inner dialog I had, yes with myself, while tasting a very fresh American IPA—a very hop centric beer. “Oh wow, mid-taste I get mango…no wait, it’s more like passion fruit…nope, it’s way closer to pineapple. I taste lemon-citrus, but yet smell more tropical fruit.”
Sound familiar? Well that inner conversation would have been way different if I had never tried pineapple, passion fruit or mango in the first place, as I would have been unable to reference those as flavors and aromatics. You with me? So part of the take away here is that tasting craft beer is more than just tasting, it’s the whole experience.
Similar to how a musician might want to understand how our ears help us hear, or a painter might want to fully understand how our eyes allow us to see, I’m just craft beer foodie who wants to know how our tongue, palate, nose and mind help us perceive flavors.
The Four Main Taste Sensations
So here goes! Flavor is a compilation (fusion) of different perceptions. Yes my dear friend, flavor is a fusion. Based on my journey thus far, here is how I summarize the four main sensations that collectively work in concert when we sample: smell, taste, sensation and experience.
Smell is the dominant sense affecting flavor. Without it, what we taste would be very simplistic and much more one-dimensional. Thus smell is a synthetic experience, in that the brain has a hard time picking apart the individual pieces, compared to taste which is an analytic experience where our brain can dissect the parts more easily.
Smell is an aromatic experience that happens via two reactions:
- Orthonasal: Sniffing with the nose (nostrils), what is perceived and chemically interpreted by the brain.
- Retronasal: Chemical reactions that take place where the nose and mouth meet. When we taste food (or beer), it gives off aroma vapors. These vapors are detected by the gustatory (taste) system receptors in the back of the mouth. There are 10,000 (or more) possible aromas that humans can detect.
Taste is a chemical sense perceived by receptors. These receptors house papillae that are the bumps on our tongue that house our taste buds. Who knew right?! By the way, we have different kinds of papillae: filliform (most concentrated in front of tongue); fungiform (most concentrated on sides of tongue) and circumvallate (detect bitter the most).
On our taste buds we have gustatory hairs. These hairs interact with saliva and food molecules. Then the hairs send chemical impulses to our brain to interpret. The main tastes we detect are:
- Sweet: brain thinks calories
- Salty : brain thinks minerals and vitamins
- Sour: brain things spoiled (sour milk) or good (orange juice)
- Bitter: brain thinks toxic or intriguing (beer bitterness/coffee roast)
- Umami: savory richness (What an aged steak delivers that a fresh cut does not; think parmesan cheese or soy sauce.)
- I’ll throw in metallic, roast, alcohol, fat, fruit and carbonation as other detectable basic tastes
Tasting sensations are referred to as chemesthetic and are detected by the trigeminal nerves—now those are two very big words! Basically it’s the chemical sensory ability of the skin and mucus membranes to interpret sensations, which help us create the entire flavor enchilada. They include: mouthfeel, temperature, carbonation, body, cooling, burning or numbing, tearing and astringency.
Small details you may not even be aware of in your surroundings can have a big impact on your tasting experience.
Atmosphere: Is the room quite or loud? Cold or hot? Are you extremely hungry? Are you distracted?
- Memories: Is there a good or bad experience being triggered by what you are smelling and tasting?
- Influence of others: If someone around you says, “Oh this tastes bitter,” that might influence your mental interpretation of what you are perceiving.
- What you’ve previously consumed: Flavors from what you’ve ingested earlier might carry over to what you are tasting now.
So with all that, and mind you I’ve skipped a lot of the scientific mumbo jumbo, go forth my fellow palate athletes. Taste, describe, repeat and build those reference memory muscles.
Julia Herz, Craft Beer Program Director for the Brewers Association, is a homebrewer, BJCP beer judge and Certified Cicerone™. Despite her extensive experience, she will always consider herself a beer beginner on an unending journey to learn more about craft beer. Additionally, for interesting articles on small and independent craft brewers check out Delicious and follow Craft Beer Muses on Twitter.