My Pinot Gris Experiment

It seems like I can’t get enough of Pinot gris. I don’t mean the white wine, but the grape. Unlike most white wine grape varieties that have yellowish-green skin, Pinot gris skin is grayish pink. As mentioned in my previous blog posts (The Pinot Gris You Never Knew and The Peeno Noir You Never Knew), Pinot gris, Pinot noir, and Pinot blanc are genetically the same grape. What differentiates them is the amount of anthocyanins or color pigments present in the grape skin and pulp.

Gemini-generated color spectrum of wine

The length of maceration (or skin contact) employed during the winemaking process has a direct impact on the wine color. It determines if your Pinot noir is going to be red or pink and if your Pinot blanc is going to be white or orange. In the case of Pinot gris, the gamut may run from white to pink and orange. In Friuli, Pinot Grigio (Italian for Pinot gris) is traditionally made with skin contact, typically in the range of one day to two weeks. Known as Ramato, the wine blurs the line between a pink and orange wine. 

This year, I decided to experiment with making a Ramato-style Pinot Gris. Below is my documented process.

Day 1 - Crush and Macerate

The grapes arrived from Crawford Vineyard the same day they were harvested. The grayish pink berries in the signature Pinot pinecone-shaped clusters were then weighed and placed into crates, ready to be crushed and de-stemmed. Once processed, the crushed grapes and juice (also known as the must) went into my fermenter with a bit of sulfite to kill any microbes and wild yeasts, preventing any off-flavors during fermentation.

My Pinot gris grapes

Adding sulfite to the must

At home, I kept the must in my “garage winery” at around 60 degrees Fahrenheit, the optimal temperature for my chosen yeast strain. If I were to make a white wine, I would immediately press the grapes to minimize skin contact. In this case, I decided to let the grapes macerate in the must and watch the color of the juice.

Day 3 - Press and Ferment

As the sulfite wore off in 48 hours, it was the time to pitch the selected wine yeast and start the fermentation process. I needed to decide if I would do it with or without skin contact. Judging from the deep salmon hue of the juice, I made the call to press the grapes prior to fermentation, ending the two-day skin contact. (In the video, my friend and wine sidekick helped collect some free-run juice during press.)

The grape skins and seeds as well as random stems were discarded as part of the process. The remaining juice was funneled into a couple of glass carboys with the yeast starter. Before long, the yeast started eating the sugar in the juice to produce alcohol. Carbon dioxide was also released as a byproduct that protected the must from pesky bacteria-carrying fruit flies.

Start of alcoholic fermentation

Day 7 - Measure and Rack

 

Four days after the yeast was pitched, the Brix reading on the juice had reached zero, indicating that most of the sugar had been fermented. That was probably the fastest alcoholic fermentation I had experienced. It was also my first time using a white wine yeast strain.

Sediments settled after racking

I racked the juice off the sediments and into new carboys to minimize the headspace. This would prevent oxidation and spoilage as fermentation slowed down and less carbon dioxide was released. The sediments (or the ‘lees’), which consisted of dead yeast cells and grape debris, soon settled to the bottom of the carboys. The clear juice that sat above was a beautiful neon salmon pink.

Day 14 - Rack and Cold Stabilize

I waited another week for the long tail of the remaining fermentation to complete. The Brix reading finally reached -1.5 degrees. The wine tasted dry but had a light fizz, indicating a bit of fermentation was still underway. In a glass, the wine was a gorgeous light salmon in color. The nose was aromatic, perfume-y, and citrus-y. On the palate, it tasted like a tart lemonade with high acidity, medium body, light tannins, and a long finish. Alas! This was trending more towards a rosé than an amber wine. But oh so pretty!

Taste test before cold stabilization

This final step was to rack the wine off the sediments again and into a freshly sanitized carboy. I added a bit of sulfite to stop any residual alcoholic fermentation and to prevent any native malolactic fermentation. Malolactic fermentation is the conversion of malic acids in the wine into lactic acids. I typically orchestrate this secondary fermentation when making red wine to soften the acid and to give it a creamier fuller mouthfeel. In the case of this Pinot gris, I decided to keep it bright and cheery.

Thoughts and Next Steps

Winemaking is such a learning experience, and I have enjoyed this Pinot gris experiment. If I had to do it all over again, which I just might with my next vintage, I would make three changes:

1. Increase the length of maceration and start alcoholic fermentation on the skin
2. Use a red wine yeast strain
3. Encourage natural malolactic fermentation 

These would allow me to extract more phenolic compounds from the grapes and give the wine more complexity. The result will be more like an orange wine. But for this year, it will be a pink Pinot gris. The wine is right now going through cold stabilization in the fridge for at least three weeks. After which, I will do another taste test. If it tastes great, it may be time to bottle. It is all very exciting! Cheers!

More Than Grape Skin Deep

Many people think of wine as red or white. Red wine comes from red grapes, and white wine comes from white grapes. While generally true, the pantone palettes of grape colors run the gamut of yellow, green, pink, purple, and even black. Still, the beauty of wine is more than grape skin deep. Let's explore a little more together. 

Wine colors by Maksym Kaharlytskyi on Unsplash

Red Wine

Red grape skin contains anthocyanins, water-soluble pigments, that give the fruit its color. When making red wine, the berries are often crushed lightly and left to soak in the juice, also known as the must. During this process of maceration, the grape skins, flesh, and seeds gently break down, releasing tannins, aroma precursors, and anthocyanins into the must. 

In red winemaking, maceration can happen before and during the alcoholic or primary fermentation. In fact, the winemaker is constantly balancing color, aroma, flavor, and the amount of tannins extracted from the grapes, lengthening or shortening the maceration period as appropriate.

Maceration

Once the yeast has converted all the sugar in the grapes to alcohol, primary fermentation is deemed complete. The wine is then pressed to remove all grape debris. The day before press, lactic acid bacteria is often pitched into the wine to start a secondary fermentation. In this fermentation, harsh green apple-y malic acid is converted to softer creamier lactic acid to give the wine a fuller mouthfeel.

After malolactic fermentation is complete, the wine is then left to age, usually in oak, for as long as the winemaker pleases before bottling. And that completes the process of red winemaking.

White Wine

While not obvious to the naked eye, anthocyanins are also present in the skin of white grapes. The amount is significantly lower to be detected visibly.

Unlike red wine, white wine is made with nearly no skin contact. Most of the flavor and aroma compounds in white grapes come from the pulp and not the skin. The skin of white grapes adds bitterness and astringency, both of which are undesirable for white wine.

White grapes harvest by Thomas Schaefer on Unsplash

In white winemaking, the grapes are harvested and immediately pressed. The skin is removed, and there is no maceration. Once the the clear juice is extracted, the must is inoculated with yeast, which begins the alcoholic fermentation.

After alcoholic fermentation is complete, depending on the grape variety and the winemaker, the wine may or may not go through malolactic fermentation and then aged in oak, stainless steel or concrete. White wine that has been aged in oak will have a deeper yellow shade to it. Otherwise, it is lightly-colored and crisp.

Pink Wine

Now that we have gone through the difference between red and white winemaking. Let's have some fun and mix it up. What if we use red grapes and make wine via the white winemaking method? 

Hey Presto! Pink wine!

Contrary to popular belief, pink wine or rosé is not made by mixing red wine and white wine together. The exception would be the blending of red and white still wines to be the base for the second (not secondary) fermentation of a pink sparkling wine.

Pink wine or rosé, a sign of summer

Pink wine is made when red grapes go through a very short period of maceration, usually four to forty-eight hours, before being pressed. After the grape skin and other debris are removed, the must is inoculated with yeast, and alcoholic fermentation begins the same way it does for a white wine.

The short maceration gives rosé its blush hue, which is what the English call the wine. Rosé has the flavor profile of a light red wine with a lot of red fruits. However, it is also crisp and bright like a white wine.

Orange Wine

Let's then try the reverse and use white grapes to make wine in the red winemaking method. Instead of removing skin contact upon harvest, macerate the white grapes in the must like you would for red winemaking. 

Viola! You get an orange wine!

Orange wine

While it may seem like a fad, the origin of orange wine goes back 5,000 years in Caucasus. Today, you can still find orange wine in the Republic of Georgia as well as Slovenia and Italy. 

Because the wine is made from white grapes with extended skin contact, it has the aroma of honey and ripe fruit, that is reminiscent of an oxidative wine. But on the palate, it is dry, tannic and tart like a red wine. Orange wine is like a heftier white wine that is served cool but not chilled. When well made, it is super interesting and can take on bold-flavored dishes, like curry or even lamb.

My Verdict: As you see, the color of wine is really more than grape skin deep. So why limit yourself to red and white? Try something different, something new, and let me know what you think.