Trockenbeerenauslese (TBA)

What Is Trockenbeerenauslese?

Trockenbeerenauslese (TBA) is the highest quality level among German Prädikat wines and represents the absolute pinnacle of wine production. These extremely rare and precious sweet wines are made from individually selected, raisin-like berries that have lost their moisture and concentrated their sugar content through Botrytis cinerea (noble rot) or extreme over-ripeness.

The name "Trockenbeerenauslese" precisely describes the state of the grapes: the berries are almost dry, shrivelled, and resemble raisins. Harvesting is carried out by laborious hand-selection, often over multiple passes through the vineyard, selecting only the most concentrated berries.

Legal Requirements

Germany

The requirements for Trockenbeerenauslese are extremely demanding:

• Minimum must weight: 150–154° Oechsle (depending on region and grape variety)
• Condition of grapes: Noble rot or overripe to raisin-like
• Hand-harvesting: Individual berries are selected by hand
• No enrichment: Chaptalization is prohibited
• Yield: Extremely low, often only a few litres per hectare

For comparison: standard quality wine requires around 50–72° Oechsle. A TBA therefore has approximately three times the sugar concentration.

Austria

Similarly strict rules apply in Austria:

• Minimum must weight: 30° KMW (approx. 150° Oechsle)
• Prädikat: Trockenbeerenauslese is part of the Prädikatswein category
• Botrytis: Usually dependent on noble rot
• Control system: Strict state inspections and quality controls

Formation and Prerequisites

The Role of Noble Rot

Most TBA wines are created through the action of Botrytis cinerea:

1. Infection: The fungus attacks ripe grapes in humid conditions (fog, dew)
2. Perforation: The fungus penetrates the berry skin with microscopically small holes
3. Water evaporation: In subsequently dry, warm weather, water evaporates through the perforations
4. Concentration: Sugar, acidity, and aromas concentrate intensely
5. Raisinification: The berry shrinks to approximately 20–30% of its original weight

Climatic Prerequisites

TBA production requires ideal weather conditions:

• Late autumn: Warm, dry days and cool, humid nights
• Fog: Morning fog promotes Botrytis growth
• Sun: Afternoon sunshine for drying and concentration
• No grey rot: Grey rot (Botrytis as a harmful fungus) must be avoided
• Long growing season: Harvest often extends to November or December

Not every vintage permits TBA production. Sometimes years pass before conditions are perfect.

Production

Harvest

The harvest is an extraordinarily demanding process:

• Multiple passes: Often 3–6 harvest passes spread over weeks
• Berry selection: Individual berries (not whole clusters) are picked by hand
• Selection: Only perfectly noble-rot-affected or raisined berries are harvested
• Time required: A harvest worker may manage only 5–10 kg per day
• Yield: From 100 kg of grapes, typically only 5–8 litres of must are obtained

Vinification

Winemaking presents special challenges:

• Pressing: Extremely difficult, as the berries are almost dry; must flows drop by drop
• Fermentation: Very slow, as the high sugar content inhibits the yeasts
• Duration: Fermentation can take months
• Alcohol content: Usually only 5–8%, as yeasts die off in the presence of high sugar
• Residual sugar: 150–300 g/l or more
• Aging: Usually in stainless steel or neutral wood to preserve the fruit

Flavour Profile

TBA wines have incredible intensity and complexity:

Aromas

• Dried fruits: Apricot, fig, date, raisins
• Honey: Intense honeyed sweetness, often with an orange blossom honey character
• Exotic fruits: Mango, pineapple, lychee
• Caramel and toffee: Through concentration and aging
• Botrytis notes: Characteristic note of noble rot, often described as a "botrytis tone"
• Spices: Ginger, saffron, oriental spices
• Nuts: Roasted hazelnuts, almonds (with aging)

Structure

• Sweetness: Extremely high, yet never cloying
• Acidity: High, often racy acidity, which balances the sweetness
• Body: Syrupy, oily, extraordinarily concentrated
• Length: Lingering finish lasting minutes
• Colour: Golden-yellow to amber, darkening with age

Grape Varieties for TBA

Not all grape varieties are suited to Trockenbeerenauslese:

Germany

Riesling: The queen of TBA. Combines high sweetness with racy acidity and develops incredible complexity. Can age for decades — even centuries.

Scheurebe: Delivers intense tropical fruit and blackcurrant aromas in TBA form.

Ortega: A fruit-intensive variety well suited to TBA.

Silvaner: Rare but excellent with a spicy note.

Austria

Welschriesling (Graševina): High acidity makes Austrian TBAs particularly fresh and long-lived.

Chardonnay: Used in Styria for TBA.

Traminer: Aromatic, exotic TBAs.

Famous TBA Regions

Germany

Mosel: Legendary Riesling TBAs with delicate acidity and endless aging potential.

Rheingau: Powerful, opulent TBAs from top sites such as Schloss Johannisberg or Kloster Eberbach.

Palatinate (Pfalz): Influenced by the warm climate, concentrated TBAs with exotic fruit.

Rheinhessen: A great TBA tradition, especially in Nierstein and Oppenheim.

Austria

Burgenland (Neusiedlersee): Ideal conditions created by the lake, which generates fog. Welschriesling TBAs are a speciality.

Wachau: Rarer, but when produced, outstanding Riesling TBAs.

Storage and Aging Potential

TBA wines are among the most age-worthy wines in the world:

• Young (1–5 years): Primary fruit and botrytis tone dominate; sweetness and acidity not yet fully integrated
• Mid-age (10–20 years): Harmonisation, development of honey and caramel notes, increasing complexity
• Mature (30–50+ years): Deep tertiary aromas, amber colour, silky-velvety texture, legendary complexity

There are reports of TBAs from the 18th and 19th centuries that are still drinkable and fascinating. The high sugar and acid content acts as a preservative.

Storage conditions:

• Constant temperature (10–12°C)
• High humidity (70%)
• Darkness
• Lying position

Price and Availability

TBA wines are among the most expensive wines in the world:

• Production costs: Extremely high due to hand labour, low yields, and risk
• Rarity: Only possible in a few vintages
• Prices: From €50–100 per 0.375 l for simpler qualities; top examples several hundred to thousands of euros
• Bottle sizes: Often 0.375 l or smaller, as production is so limited

Trockenbeerenauslese is more than a wine — it is a miracle of nature, a symbiosis of ideal climate, noble fungus, and human skill. A luxury that demands patience, experience, and the right weather at the right time — and rewards with a tasting experience unlike any other.