Flight Mode for Taste Buds: What Are We Drinking in the Clouds?
Air travel has an undeniable charm, but let’s be honest – it’s rarely a culinary experience. When a flight attendant pours you coffee into a plastic cup somewhere above the clouds, disappointment often follows. It tastes bitter, dull, and somehow lifeless, even though you might consider the same blend quite acceptable on the ground. However, it is not always just the fault of the crew or cheap coffee beans. The main culprits are physics and the biology of the human body, which switches to a completely different mode at an altitude of ten kilometers above the ground.
As soon as the plane door closes and the cabin is pressurized, the environment around you changes dramatically. The humidity in an airplane drops below 12%, which is drier air than in most of the world’s deserts. This extremely dry air, combined with lower pressure, instantly dries out our mucous membranes and impairs our olfactory receptors. And since up to 80% of what we perceive as flavor actually comes from our sense of smell, the coffee experience is doomed to a sharp downward spiral from the start.
Our taste buds become dulled in the clouds just as if we had a severe cold – which is why coffee loses its natural sweetness and only empty bitterness remains.
Research shows that at cruising altitude, our sensitivity to sweet and salty tastes decreases by up to 30 percent. In contrast, the perception of bitter and sour tastes remains almost unaffected. The result? Any subtle, fruity, or chocolate undertones of specialty coffee that you would enjoy in our cafe disappear completely on a plane. Only harsh bitterness comes to the fore, which is often further amplified by the incorrect water temperature of airplane coffee machines. Due to the lower pressure, water in a plane boils at around 90 °C, which significantly changes the entire extraction process.
To all this, we must add the constant white noise of the engine and cabin noise. Psychological studies confirm that loud background sounds subconsciously suppress our ability to perceive the sweetness of food and drinks. Drinking coffee on board a plane is thus more of a struggle with the environment than a real pleasure. So, the next time you tell yourself on a plane that the coffee is terrible, be lenient with it – your body simply cannot work at 100 percent in that moment, and the coffee is only partially to blame.
What can you do about this if you don’t want to give up your coffee ritual during a flight? The solution is to choose coffees with a full body, lower acidity, and a more pronounced profile for your travels – such as darker roasted beans from Brazil or India, which will retain at least some of their characteristics even in difficult conditions. Alternatively, you can try a high-quality tea or reach for tomato juice, which, thanks to its specific umami flavor, actually tastes much better on a plane than on the ground.
However, the best recipe for coffee disappointment in the clouds is to hold out and look forward to returning to solid ground. Truly good coffee needs the right atmospheric pressure, optimal humidity, and, most importantly, a calm atmosphere where you can perceive it with all your senses. Therefore, as soon as you land, leave the in-flight emergency mode behind and stop by our place. We have a fresh espresso ready for you that is guaranteed to wake your taste buds to life and bring you back to coffee paradise. Have a safe flight, and see you at the bar!