The bubbles of cava: discover their secrets

The bubbles in cava are one of the most distinctive and fascinating features of this sparkling wine. But have you ever wondered how these bubbles form and what they reveal about the quality of the cava?

In this article, we explore the wonderful world of cava bubbles and how they contribute to the unique experience this wine offers.

How Do Bubbles Form?

Bubbles in cava are produced by the release of carbon dioxide (CO₂) generated during the fermentation of the must by yeast.

In the first stage of fermentation, in the presence of abundant oxygen, yeast metabolises sugars and starches, converting them into water and CO₂. As the carbon dioxide increases, the oxygen level drops, and alcohol begins to form.

The bubbles in cava are achieved through a second fermentation within the same bottle. The carbon dioxide in sparkling wines can exist in three forms:

• Free or undissolved CO₂: Gas that occupies the empty space in the bottle.
• Dissolved CO₂: Retained in the wine, slowly released over time, producing bubbles when poured into a glass.
• Combined CO₂: Chemically bound in small amounts with certain wine compounds and imperceptible to the eye.

Characteristics of the Bubbles

The size, ascent speed, and release of bubbles can indicate the quality of the cava and its ageing process.

Bubble Size
Bubble size is an indicator of quality. When the second fermentation progresses slowly, protected from light, at constant humidity and low temperatures deep in the cellar, the carbon dioxide forms gradually. Small, slow-rising bubbles indicate high quality, while large, fast-rising bubbles suggest lower quality.

Rows or "Rosaries"
Bubbles form vertical streams from the bottom to the surface, gradually increasing in size. These originate from tiny particles on the glass walls, where the surface tension of the wine breaks in a process called "nucleation." Quality is judged by the abundance, fineness, and persistence of these rosaries.

Foam
The foam on the wine’s surface is another indicator of quality. A wide, persistent foam suggests an excellent sparkling wine. The longer the foam lasts before dissipating, the higher the quality of the cava.

The Role of Bubbles in Cava Tasting

Bubbles play a crucial role in the perception of cava during tasting. They provide clues about the wine’s quality and influence its flavour and texture.

Mouthfeel
Cava bubbles create a lively, sparkling sensation on the palate. Small, numerous bubbles offer a smoother, creamier mouthfeel, while larger, fewer bubbles may feel more aggressive and acidic.

Aroma and Flavour
Bubbles also release aromas and flavours. When bubbles burst at the surface, they release tiny aromatic molecules, enhancing the perception of the cava’s nuances. They can also intensify certain flavours, adding complexity to the tasting experience.

Cava Bubbles at Bodegas Romale

At Bodegas Romale, we understand the importance of bubbles in our cavas. Our fermentation process is slow and meticulous, ensuring each bubble forms perfectly. Our cavas feature small, numerous bubbles, providing a soft and creamy sensation on the palate.

We also ensure the longevity of the bubbles by storing cavas under optimal temperature and humidity conditions, preserving their quality until tasting.

The Art of Serving Cava

Serving cava correctly is essential to fully enjoy its bubbles and all they contribute to the tasting experience.

Ideal Temperature
Cava should be served cold, but not icy, ideally between 6°C and 8°C. At this temperature, bubbles form at a steady rate, gradually releasing the wine’s aromas and flavours.

Opening the Bottle
The moment of opening is crucial to preserve bubbles. The cork should be held firmly with one hand while rotating the bottle with the other, allowing the cork to release slowly and retain as much carbon dioxide as possible.

Choosing the Right Glass
The type of glass also affects bubble formation. Cava flutes are ideal, as their narrow, elongated shape allows bubbles to travel longer, maintaining effervescence. They also make it easier to observe the bubbles’ ascent.

Different glasses can lead to markedly different bubble behaviour, as imperfections in the glass or detergent residue can affect the formation of rosaries.

Cava Bubbles – A Symbol of Celebration

Bubbles are more than a feature of cava; they are a symbol of celebration, joy, and shared moments. At Bodegas Romale, we take pride in being part of your celebrations through our perfectly crafted bubbles