Advanced Wine Making Techniques

Winemaking 101: A Beginner’s Guide to Crafting Your Own Wine

Advanced Wine Making Techniques

Once you have mastered the basics there is a lot of room for experimentation and mastery. Winemaking is a never ending art. Here are some advanced wine making techniques to be aware of.

1. Oak Aging and Oak Alternatives

Oak aging is one of the most well-known techniques for imparting additional flavors and structure to wine. The right oak barrels and the method of aging can elevate the flavor profile of wine by adding richness, spice, and complexity.

a. Types of Oak Barrels:

French Oak: Known for its subtle and elegant flavors, French oak imparts spice, vanilla, and toasty characteristics. It’s often used for Bordeaux-style reds (like Cabernet Sauvignon and Merlot) and Chardonnays.
American Oak: American oak barrels provide more pronounced vanilla, coconut, and caramel flavors. They’re often used for more robust wines, such as Zinfandel or Syrah.
Hungarian Oak: This oak offers a balance between French and American oak, with less intense vanilla flavors, and a more spicy, earthy profile.

b. Barrel Aging vs. Oak Alternatives:

While traditional barrel aging offers the best results in terms of texture and flavor integration, it can be costly and time-consuming. Oak alternatives like oak chips, oak staves, and oak powder can provide some of the benefits of barrel aging at a fraction of the cost.

Oak Chips: These are added directly to the fermenting or aging wine. They impart oak flavor relatively quickly, and they come in different toast levels (light, medium, or heavy), which influences how much vanilla, smoke, or spice gets imparted.
Oak Staves: Placed inside stainless steel tanks, these staves offer a more controlled extraction of flavors over time and are often used when a winemaker wants to maintain consistency.

c. Timing and Techniques for Oak Aging:

Maturation Time: The longer the wine is aged in oak, the more oak-derived flavors it will pick up. However, too much time in oak can overpower the fruit character, so timing is crucial.
Toast Levels: Oak barrels are charred or toasted to varying levels to influence the flavors that are transferred to the wine. Lighter toasts enhance fruitiness, while heavier toasts bring out more smoke, spice, and caramel notes.

2. Malolactic Fermentation (MLF)

Malolactic fermentation is a secondary fermentation process where lactic acid bacteria convert harsh malic acid (the kind found in apples) into softer lactic acid (found in milk). This process is commonly used in red wines and some white wines like Chardonnay to reduce acidity and enhance mouthfeel.

a. Why Use MLF?

Softer Texture: The reduction of malic acid makes the wine feel smoother and less tart.
Flavor Development: MLF contributes buttery, creamy, or nutty flavors. This is particularly prized in full-bodied whites like Chardonnay.
Increased Stability: MLF can also help stabilize the wine by reducing the chances of unwanted bacterial growth.

b. How to Control MLF?

Inoculation: Winemakers can add specific strains of MLF bacteria to ensure the process occurs, or they can let spontaneous fermentation occur.
Temperature: MLF typically takes place at 60-72°F (15-22°C). Keeping the temperature in this range helps the bacteria flourish.
Timing: In warmer climates, MLF may occur naturally during primary fermentation, while in cooler climates, winemakers often have to add bacteria to encourage it after the alcoholic fermentation finishes.

c. MLF Management:

Inhibition of MLF: Sometimes winemakers don’t want MLF to occur, especially in wines that benefit from a crisp, fresh acidity. In such cases, sulfur dioxide (SO₂) is used to inhibit the growth of lactic acid bacteria.

3. Micro-Oxygenation

Micro-oxygenation is a technique that mimics the slow oxygen exposure that occurs naturally during barrel aging. By introducing controlled amounts of oxygen into the wine, winemakers can achieve certain benefits without having to rely on oak barrels.

a. What Does Micro-Oxygenation Do?

Softens Tannins: It helps soften the tannins in red wine, improving the texture and making it more approachable, even when the wine is young.
Enhances Flavor Integration: Oxygen exposure helps to integrate flavors in the wine, making them more cohesive and balanced.
Reduces Astringency: It can reduce the harshness of young red wines, creating a smoother mouthfeel.
Improves Wine Stability: By introducing controlled oxygen, it can help stabilize the wine and enhance its aging potential.

b. How Is Micro-Oxygenation Done?

Oxygenation Devices: Specialized devices are used to introduce small, controlled doses of oxygen into the wine. These can be done during fermentation or after fermentation.
Timing and Dosage: The amount of oxygen added is carefully measured, as too much oxygen can cause oxidation, which is harmful to the wine.

4. Blending Wines

Blending is an art form in winemaking, and it plays a huge role in creating wines with balance, complexity, and harmony. Blending allows a winemaker to create the best version of a wine by combining different grape varieties, vineyards, or even barrels.

a. Why Blend Wines?

Flavor Complexity: Blending can bring together the strengths of different varieties, creating a wine with a wide range of aromas and flavors.
Consistency: When working with multiple vineyards or vintages, blending helps winemakers maintain a consistent product year after year.
Correcting Imbalances: If one lot of wine is too tannic, too acidic, or lacking in fruit, blending can help balance those characteristics.

b. Types of Blends:

Varietal Blends: Combining two or more grape varieties to enhance the overall character of the wine. Famous examples include Bordeaux blends (Cabernet Sauvignon, Merlot, and Cabernet Franc) and Rhone blends (Syrah, Grenache, and Mourvèdre).
Vintage Blends: Using wine from different harvest years (vintages) to create a consistent style.
Terroir Blends: Blending wines from different vineyards or regions to create a wine that expresses a particular style or flavor profile.

c. The Blending Process:

Trial Blending: Winemakers often conduct trial blends by mixing small amounts of different wines to see how they interact before committing to a final blend.
Aging and Blending: Some winemakers prefer to age different lots of wine separately before blending, while others blend before aging. The method chosen can influence how the wine integrates and evolves.

5. Controlled Fermentation (Temperature, Yeast Strain, and Additives)

Fermentation is where the magic happens, and controlling the process allows winemakers to direct the wine’s final profile. Advanced techniques in fermentation include managing the temperature, selecting the yeast strain, and adding enzymes or nutrients.

a. Temperature Control

Cool Fermentation: Cooler temperatures preserve the fresh fruit character in white wines and some red wines (like Pinot Noir).
Warm Fermentation: Warmer temperatures are used to extract more color, tannins, and flavors from red grapes, particularly for full-bodied reds.

b. Yeast Selection

Wild Yeasts vs. Cultured Yeasts: Wild yeasts are naturally occurring and can lead to more complex, unpredictable fermentations, while cultured yeasts are specifically chosen to give a desired result.
Indigenous Fermentation: Some winemakers prefer native yeasts from the vineyard, which can create wines with a more “terroir-driven” expression.

c. Enzyme Additives

Pectinase: Helps break down the skins and pulp, improving juice extraction.
Tannin Additives: Sometimes winemakers add extra tannins to increase structure, particularly in wines that are expected to age for long periods.

Conclusion:

Advanced winemaking techniques provide the tools and flexibility to control and shape the wine from vineyard to bottle. Whether you’re aiming for a smoother mouthfeel with oak aging, enhancing complexity through blending, or using micro-oxygenation to soften tannins, these methods open up exciting possibilities for producing unique and high-quality wines.