Have you ever taken a sip of red wine and noticed a slightly dry, grippy sensation across your gums, tongue, or cheeks? Maybe the wine felt silky and smooth, or perhaps it left your mouth feeling almost puckered.
What you're experiencing is probably tannin.
Tannins are one of those wine terms that can sound technical, but they're actually remarkably easy to recognize once you know what you're looking for. And understanding them can tell you a lot about the wines you enjoy, the foods that pair well with them, and even how a bottle might change as it ages.
Last week, we explored what it means when a wine is described as dry. This week, we're looking at something slightly different: why some wines actually feel drying in your mouth.
What Exactly Are Tannins?
Tannins are naturally occurring compounds found in many plants, including grapes.
In wine, they come primarily from grape skins, seeds, and stems. Because red wines typically spend considerably more time fermenting in contact with their skins than white wines, they generally contain much higher levels of tannin.
Wine can also pick up additional tannins from oak barrels during aging.
But you don't need to understand the chemistry to recognize tannins. They're less about a particular flavor and more about how a wine feels in your mouth.
What Do Tannins Feel Like?
One of the easiest ways to understand tannins doesn't involve wine at all.
Make yourself a cup of strong black tea and let the tea bag steep a little longer than usual. Take a sip and pay attention to what happens afterward.
You'll probably notice a slightly drying, puckering sensation across your tongue, gums, and cheeks.
Those are tannins at work.
A similar sensation occurs with foods like dark chocolate, walnuts, and the skins of certain fruits.
In wine, tannins can range from incredibly soft and silky to firm, chewy, grippy, or even slightly rough. Learning to notice those different textures is one of the easiest ways to begin understanding the structure of a wine.
Dry Wine and a Drying Wine Aren't the Same Thing
This is an important distinction—and a perfect follow-up to our discussion last week.
When we describe a wine as dry, we're talking about sweetness. A dry wine has little or no perceptible residual sugar.
When a wine makes your mouth feel dry, however, tannins are usually responsible.
The two sensations aren't the same.
A crisp Sauvignon Blanc, for example, can be completely dry while containing very little tannin. A young Cabernet Sauvignon can also be completely dry but have substantial tannins that leave your mouth feeling noticeably grippy.
Once you separate those two ideas, wine terminology starts making considerably more sense.
Why Do Some Wines Have More Tannins Than Others?
Grape variety plays a major role.
Certain grapes naturally have thicker skins and higher tannin levels. Cabernet Sauvignon, Nebbiolo, Syrah, and Tannat, for example, are known for producing wines with considerable tannic structure.
Other varieties tend to be gentler. Pinot Noir and Gamay generally produce wines with softer, less pronounced tannins.
But the grape is only part of the story.
Winemakers can influence tannins through decisions in the vineyard and winery, including how ripe the grapes are when harvested, how long the juice remains in contact with the skins, whether stems are included during fermentation, and whether the wine spends time aging in oak.
That's one reason two wines made from the same grape can feel remarkably different.
Are Tannins Good or Bad?
Neither.
Tannins are simply one component of a wine's structure, alongside acidity, alcohol, fruit, and sweetness.
In a well-balanced wine, tannins can provide shape and texture. They can make a wine feel substantial and give it a sense of length after you swallow.
But more tannin doesn't necessarily mean better wine.
Some wonderful wines are delicate and silky. Others are powerful and structured. What matters is how the tannins interact with everything else in the glass—and, ultimately, which style you prefer.
Why Does Food Make Tannic Wine Taste Different?
This is where tannins become especially useful to understand.
There's a reason structured red wines are so often paired with rich foods. Proteins and fats can soften our perception of tannins, making the wine seem smoother and allowing its fruit and other flavors to become more noticeable.
Try a tannic red wine by itself and pay attention to that drying sensation. Then take a bite of something rich—aged cheese, mushrooms, lentils, or another savory dish—and taste the wine again.
You may be surprised by how different it feels.
This is part of the magic of food and wine pairing: neither the food nor the wine necessarily changes, but your experience of them together does.
What Happens to Tannins as Wine Ages?
Tannins also play an important role in a wine's ability to age.
When certain red wines are young, their tannins can feel powerful, firm, or even slightly aggressive. Over time, those tannins undergo chemical changes that can make the wine feel softer and more integrated.
That's one reason a young Cabernet Sauvignon or Barolo can taste very different after spending years in the cellar.
The fruit may become less primary, new savory and earthy aromas can develop, and the once-firm tannins may become smoother and more refined.
Of course, not every tannic wine needs decades in a cellar. Plenty are deliberately made to be delicious when they're young. But tannin is one of the structural elements winemakers consider when thinking about how a wine might develop over time.
How Can You Learn to Recognize Tannins?
The best way is simply to start paying attention to texture.
The next time you taste a red wine, don't immediately focus on whether you taste cherry, blackberry, tobacco, or anything else. Instead, notice how the wine feels.
Does your mouth feel smooth after you swallow? Is there a gentle grip around your gums? Does your tongue feel slightly dry? Or does the wine leave behind a powerful puckering sensation?
Better yet, taste two different reds side by side. Compare a softer Pinot Noir or Gamay with a more structured Cabernet Sauvignon or Nebbiolo.
You don't need to decide which one is "better."
Just notice the difference.
Learning What You Like
That's ultimately why understanding tannins matters.
Wine vocabulary isn't useful because it allows you to sound knowledgeable. It's useful because it helps you communicate what you enjoy.
Maybe you love powerful reds with firm, structured tannins. Perhaps you prefer something softer, silkier, and easier-going. Or you might discover that you enjoy more tannic wines when they're served alongside food.
There's no correct answer.
The more attention you pay to these sensations, the easier it becomes to walk into a wine shop and say, "I like reds with really soft tannins," or "I'm looking for something structured to have with dinner."
And suddenly, finding your next bottle becomes much easier.
About Vinodivino
At Vinodivino, we believe wine should inspire curiosity rather than confusion. Through complimentary weekly tastings, engaging wine classes, private events, and a carefully curated collection from exceptional family-owned producers, we're here to help Greater Boston discover wines with confidence, one glass at a time.
