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Alcohol Geekery: Wine Tasting

(originally posted in bovil)

There is a difference between wine tasting and wine drinking. In wine tasting, you spit instead of swallowing.

Now this isn't just pretense, nor just a way to avoid getting drunk. If you swallow, after a few tastes (and well before you're drunk) the alcohol in your system starts to contaminate your nose and your taste buds (think about it, breathalyzers work). This ends up masking a lot of the flavors and smells of the wine (a common complaint about high-alcohol wines in the first place).

That's all I'm going to say on that subject. I'm not so serious about tasting that I'm going to spend a day spitting wine into buckets, although I may not finish every pour even with wines I like.

Beyond that, what's the best way to taste?

The wine should be the right temperature.

White wines should be chilled. We're not talking ice-cold or even refrigerator temperature, just chilled. Say 50° give or take 5. White wines tend to balance out better when they're chilled, but beyond that the flavors just die.

Red wines should be "cellar temperature." That's not room temperature, particularly in summer. We're talking a just a little chilled, 60° give or take 5. Same deal as above.

That's not to say you can't drink red or white warmer, and many still hold up very well at room temperature.

So you've got the temperature right. Then there's the glass. Riedel Crystal has made a fortune convincing people that they need specific glasses for specific wines. Now this isn't total bullshit, but a basic wine glass is all you really need. A wine glass is designed to be filled part way; the inward curve towards the lip serves to capture the vapors coming off the wine. The stem (and yes, you can hold it by the stem, holding the foot is pure silliness) keeps your hands from warming the wine in the bowl.

Open the bottle and check the cork (if you're at a winery the hosts have already done this, tasted, and pitched any bad bottles). It should be springy and moist at the bottom. If it's mushy or dry, your wine is probably going to be nasty. Dry usually means oxidation in the bottle. Mushy probably means fungus, mold or mildew in the cork.

Pour in about an ounce. Take a look at the wine and consider the clarity and color. Hold it up to the light if it's a really dark red. Cloudiness and off-colors are a sign there's probably something wrong.

Swirl the wine around in the glass. This isn't just pretentious bullshit. Swirling the wine encourages it to evaporate a bit, filling the rest of the glass with vapors. It also aerates the wine, helping along an oxidation process that will over the short term usually make the wine better (and over the long term destroy it).

If you look at the wine as it sticks to and runs back down the sides of the glass, you may see "legs" or "tears" forming. It's a pretty effect, but mostly meaningless. It's just in the nature of a liquid combining water and alcohol. Attributing any more significance to legs is bullshit.

Give the wine a healthy sniff, and consider the combination of smells from glass. Snobby folks will call this "bouquet" and less-snobby folks will call this the "nose." You're looking for pleasant smells such as fruit and alcohol, but you're also watching out for bad smells like mold and mildew. If the nose is unpleasant, the bottle is probably trash, do not pass go, do not collect $200.

Finally it's time to actually taste the wine. Put a bit in your mouth and slosh it around a bit. Again, not pretense but practicality. It's not just your tongue and a few taste buds that really make up taste; moving the wine around in your mouth gives you more of a taste.

Assuming that you haven't been chalking up warning signs and have to spit it out because it's disgusting (and that happens even in the best of wines; cork isn't perfect and storage sometimes goes wrong), think about what the flavors in the wine compare with.

"Body" describes how rich or thin the flavors are. Do the flavors linger and fill your mouth, or do they fade away quickly? Either can be desirable, or can be awful.

Flavors and smells start out pretty basic. There's fruit. What kind of fruit? Depends on the wine. Very rarely is it grape, though; "grapey" is generally an insult. Apple, pear, cherry, raspberry and others are common fruit flavors depending on the wine.

There's butter and vanilla. Buttery flavor comes from a particular fermentation process. Vanilla comes from aging in new oak barrels (pulling the sugars out of the wood). Both flavors are common in California Chardonnay; it's the style many winemakers have embraced.

There's alcohol. Too little and it doesn't taste like wine. Too much and it wipes out the other flavors.

Then the weird tastes start coming in.

"Tannins" are the flavors (acids, actually) that make your mouth feel a bit fuzzy and dried out. They come out of the grape skins when making red wine. Some red wines will display this effect more than others.

Mineral flavors (go lick a small piece of granite, you'll understand) are considered desirable, and actually do help other flavors balance.

Peppery (as in black pepper) flavors are common in some red wines.

Grassy and smoky flavors can come from barrel-aging. They're often interesting in small degrees but nasty if overdone.

Vegetable flavors (such as green bell pepper) can be desirable if they're well balanced, but often are way too strong. Under-ripe cabernet sauvignon grapes produce a very "green" flavor in wine.

So...

If you're reading wine reviews to figure out what to buy, don't look too hard at the numbers. Figure out what you like about the wine you like, and what you don't like about the wine you don't like. Look at the review description of the tastes in the wine, and compare that description to your experiences. If it's not close, forget that reviewer and find one whose tastes are closer to yours. Choose new wines on the merits of the descriptions, not just the numbers.

If you just want to drink some wine, drink what you like. Taste when you have the chance to find out if there's new wines you might also like. Just don't get too wrapped up in the insanity.

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Comments

( 8 comments — Leave a comment )
jbriggs
Jun. 23rd, 2005 02:27 pm (UTC)
You should bold the part about "legs."
galtine1
Jun. 23rd, 2005 02:57 pm (UTC)
Come now, I like to know if I'm going to get a buzz or not...legs tell tales!!


6. Swirl the wine in your glass. Observe the way the wine runs down the sides of the glass. Some wines will form "legs" or "tears." A wine's legs are a visual notion that were once thought to indicate quality and balance, but in reality legs comment on surface tension and alcohol content. Wines that don't form legs typically have low alcohol levels.

From: Tasting Wine
by Watson Hawkins, HGTV.com http://www.scripps.com/featurefronts/wine/tastingwine.html
jbriggs
Jun. 23rd, 2005 03:13 pm (UTC)
Tall Tales!
galtine1
Jun. 23rd, 2005 03:23 pm (UTC)
Are you saying science is not proven with the viscosity of the liquid and how quickly/slowly the beverage in question tries to pull itself back together???
jbriggs
Jun. 23rd, 2005 03:37 pm (UTC)
Viscosity is a function of suspended solids in proportion to liquids. The two liquids in question are water and alcohol. Evaporate the water, you get high alcohol content in proportion to the solids, and "legs." Evaporate the alcohol, you get low alcohol content, and "legs." "Legs" can show you how viscous the liquid is, but doens't say diddlysquat about alcohol. Or as bovil says:

"It's just in the nature of a liquid combining water and alcohol. Attributing any more significance to legs is bullshit."
galtine1
Jun. 23rd, 2005 03:43 pm (UTC)
?? Alcohol to water ratio would create different legs....

http://www.winepros.org/aftertaste/3-myths.htm

REALITY: Wine legs originate from high ethanol, and are no indication whatsoever of quality.
The phenomenon, called the Gibbs-Marangoni effect after the two scientists who first explained it, occurs because of four properties of chemical physics. First, if the molecular attraction between solids and liquids called interfacial tension is slightly greater than the surface tension which holds the liquid molecules together, the liquid "crawls" up the glass (assuming the glass is clean). Of wine's two primary components, alcohol evaporates faster than water. As the ethanol evaporates, gravity takes over, the surface tension is broken and the water runs back down into the glass in rivulets. These "legs" or "tears" are observable because of the difference in the way alcohol and water each refract light. The phenomenon occurs most readily in wines above 12% alcohol. Although ethanol, wine's primary alcohol, is a major contributor to the "body" of a wine, a high content does not alone guarantee fullness or texture in wine. Additional discussion.

APPLICATION: Legs are the Lava Lamps of wine tasting; they provide contemplative amusement, but shed precious little illumination on the subject at hand. Next time someone showily remarks that a wine "has great legs," explain the principal and enlighten them. Or don't. In fact, you may get more satisfaction from chiming-in that you think "the wine also displays a great ass" and let it go at that. For a good parlor trick, cover a "weeping" glass with a card. The effect stops (no evaporation). Remove the card, the glass soon returns to "tears".

MY CONTENTIONS: Someone will argue (wrongly) that the "legs" phenomenon arises from a high glycerine content. Wine does contain a trace amount of 2glycerol, an alcohol compound. Glycerol does not produce legs, however, as its boiling point is way above that of ethanol and its volatility therefore much lower. Glycerol contributes slightly to the perception of wine sweetness and smoothness.

Wine does NOT contain glycerine, a trade-name for a glycerol syrup that can be purchased at pharmacies. Adding the syrup glycerine to wine will eventually, in fact, produce an artificial "legs effect" from coating the glass, but why would anyone do this? Not only is it unnatural, the amount necessary to show "legs" will also give the wine a metallic and bitter taste.


I've never said that legs = quality. Bovil's comment is about attributing QUALITY to legs. His own comment about alcohol vs. water is my same argument, with a different interpretation.
jbriggs
Jun. 23rd, 2005 03:49 pm (UTC)
Okay, I am partially corrected. Several sources agree that it is a measure of alcohol content, however The Wine Merchant also says:

A lot of myths have evolved about what the 'legs', or more properly called 'tears', observed in a glass of wine represent. They are not representative of a wine's quality or of its glycerol content. They are representative of a wines alcohol content, i.e., the more alcohol, the more legs. However, wines would have to have about a 5% difference in alcohol level to notice a significant difference to the untrained eye. Often the cleanliness of the glass or having a residual soap film from incomplete rinsing can alter the interfacial tension (see below) thereby changing the results.

Anyway, wine tasting is about the taste, not about getting drunk.
galtine1
Jun. 23rd, 2005 04:13 pm (UTC)
picking nits.....
I'll give you that point. But what about when you are looking at the sample pour from the bottle for dinner?? If it's a wine you are familiar with, you would notice something different (with good eyes) if something changed in the bottle.
( 8 comments — Leave a comment )