What Makes Los Peperetes' Jersey Butter So Special?

The conserva nobody saw coming

If someone had told us a few years ago that one of the most talked-about Spanish conservas would be tuna belly preserved in butter, we probably wouldn't have believed them.

And yet, here we are.

The Tuna Belly in Butter by Los Peperetes has become one of the most sought-after gourmet conservas in recent years. While the quality of the tuna belly is certainly a big part of the story, much of its success comes from a less obvious ingredient: Jersey butter.

It's a product that surprises people the first time they try it and one that many customers come back for again and again.

What exactly is Jersey butter?

The butter used by Los Peperetes is far from ordinary. It comes from Airas Moniz, a small dairy producer in Galicia known for working exclusively with Jersey cows.

These cows spend much of their lives grazing freely on natural pastures, something that directly influences the quality of the milk and the butter produced from it.

Jersey cows are famous for producing milk with an exceptionally high butterfat content, resulting in a butter that is richer, creamier, and more flavorful than standard butter.

There is another important factor that makes it special: production is limited.

This is not an industrial butter produced on a massive scale. It is crafted in small quantities using milk from a relatively small herd of pasture-raised animals. That combination of animal welfare, traditional production methods, and exceptional raw materials is one of the reasons why Airas Moniz butter is so highly regarded.

Why did Los Peperetes choose it?

When you're working with premium tuna belly, the goal isn't to cover up the flavor of the fish. It's to enhance it.

Jersey butter adds a silky richness that complements the natural texture of the tuna without overwhelming it.

Instead of competing with the fish, it creates a more rounded and indulgent experience.

It might sound unusual on paper, but once you taste it, the pairing makes perfect sense.

A completely different experience from olive oil

Most premium tuna belly conservas are packed in olive oil, and for good reason. It's a classic combination that works beautifully.

But butter offers something entirely different.

The texture is softer, creamier, and more luxurious. Every bite feels richer, making it a surprisingly natural match for the delicate character of tuna belly.

It's not better than olive oil. It's simply a different experience.

How we like to serve it

If there's one piece of advice we always give people trying this conserva for the first time, it's this: don't eat it straight from a cold pantry.

Let the tin come to room temperature, or gently warm it before serving.

Once the butter begins to melt, everything changes.

Some of our favorite ways to enjoy it are:

• On toasted bread
• With roasted piquillo peppers El Navarrico
• As part of a gourmet conservas board
• With a glass of Albariño or Godello
• Simply on its own

Why has it become so popular?

In a market filled with new products every year, it's not easy to surprise people.

Yet Los Peperetes managed to do exactly that.

Even longtime conservas enthusiasts were curious to try something so different.

The combination of exceptional tuna belly, limited production, and rich Jersey butter created a product unlike anything else available.

As more people discover Spanish conservas, this has become one of those products that gets recommended over and over again.

More than just a viral conserva

It's easy to assume that the success of Tuna Belly in Butter comes from social media attention alone.

But people don't buy the same product over and over because of a photo.

The reason so many customers keep coming back is much simpler: it's genuinely delicious.

The combination of exceptional tuna belly and Jersey butter produced by Airas Moniz from pasture-raised cows creates a conserva unlike anything else on the market. The quality of both ingredients, together with the limited production, helps explain why this product has become one of the most sought-after gourmet conservas in recent years.

And once you experience how the Jersey butter and tuna belly work together, it's easy to understand why this has become one of the most talked-about Spanish conservas of recent years.