Ethopia Anaerobic

Anaerobic-Natural Processing, Ethiopian Roots

This coffee is grown in Ethiopia and processed anaerobic-natural — a variation on the country's traditional dry (natural) method that adds a sealed, oxygen-free fermentation stage before the cherries ever reach the drying beds. Ripe cherries go into an airtight tank, sometimes fitted with a one-way valve that lets built-up gas escape without letting outside air in, where they sit for a controlled period before being spread out to dry whole in the sun, the way natural-processed Ethiopian coffee always has been.

Anaerobic fermentation is a genuinely new addition to that old tradition. The technique only entered specialty coffee's mainstream vocabulary after the 2015 World Barista Championship, when Sasa Sestic won using a carbonic-maceration-processed Colombian lot and set off a wave of experimentation with sealed-tank fermentation across origins that had never used it before, Ethiopia included. Ethiopian producers were relative latecomers to the technique compared with some Central American origins, but the country's existing natural-processing infrastructure — cherries are already dried whole rather than pulped — made it a natural, if recent, extension rather than a wholesale change in method.

Inside a sealed tank, yeast and bacteria naturally present on the cherry skin and in the surrounding air break down sugars without the oxygen a standard open-air fermentation would have access to, producing esters, organic acids, and alcohols that a conventional process doesn't develop to the same degree. Those compounds are what push this cup's honey and strawberry notes toward something riper and more concentrated than a standard natural-processed Ethiopian lot typically shows, while the orange-peel note adds a citrus-pith edge that keeps the sweetness from running flat.

Because the technique is still evolving, exact fermentation times, tank types, and temperatures vary considerably between producers and harvests even within the same country — the common thread across all of them is the sealed, low-oxygen environment, not a single standardized recipe.

Honey, Orange Peel, Strawberry

This cup leads with a thick honey sweetness, moves through ripe strawberry, and finishes with an orange-peel note that reads more like citrus pith than juice — bitter-edged rather than purely sweet. Body is medium, acidity is soft and rounded rather than sharp, with a fermentation-driven weight that's noticeably heavier than a standard washed or even conventionally natural-processed Ethiopian coffee.

That profile is the anaerobic signature: extended, oxygen-free fermentation produces esters and organic acids that read as riper, boozier fruit — closer to preserved or macerated fruit than fresh fruit — along with a softer, more rounded acidity than the bright, citric acidity typical of washed Ethiopian coffee. The orange-peel bitterness is a useful marker of that fermentation intensity; it's not a flavor a standard natural process tends to produce on its own.

This is a coffee for drinkers who already find standard natural-processed Ethiopian coffee appealing and want something more intense and less conventional — it rewards curiosity more than it plays it safe.

Pour-Over Shows The Fermentation Character Best

A pour-over method (V60, Chemex, or similar) is the best way to taste this lot's fermentation-driven complexity without the added weight full-immersion brewing adds on top of an already heavy-bodied cup.

Ratio: 1:16 coffee to water by weight, roughly 20g coffee against 320g water.

Grind: Medium-fine, similar to table salt.

Water temperature: 195-200°F (90-93°C) — slightly cooler than a typical pour-over, since higher heat can push the orange-peel bitterness further forward than it needs to be.

Time: Aim for a total brew time of 2:30-3:00.

Aeropress

For an even more concentrated cup, an Aeropress with a 1:14 ratio and a 2-minute steep before pressing leans further into the honey and strawberry notes.

Storage And Freshness

Keep this coffee whole-bean and grind it just before brewing — fermentation-driven aromatics fade quickly once ground and exposed to air, more so than in a conventionally processed coffee. Store the bag sealed, airtight, and away from light and heat.

Did You Know

• A single competition-winning coffee launched anaerobic processing into the mainstream. At the 2015 World Barista Championship, Sasa Sestic won using a carbonic-maceration-processed Colombian lot — a result that sent roasters and producers worldwide experimenting with sealed-tank fermentation within just a few years.

• The technique borrows its name and method from winemaking. Carbonic maceration, one form of anaerobic processing, comes directly from Beaujolais wine production, where whole grapes ferment inside their own skins in a carbon-dioxide-rich environment before being pressed — coffee producers adapted the same idea to whole cherries.

• Sealed tanks are sometimes fitted with a one-way valve. It lets carbon dioxide that builds up during fermentation escape without letting outside oxygen back in, keeping the tank's environment anaerobic for the full fermentation period rather than just at the start.

• A Costa Rican producer was experimenting with anaerobic fermentation before it had a name. Luis Eduardo Campos is credited as one of the earliest producers to try sealed, oxygen-free fermentation in coffee, ahead of the competition result that eventually made the technique famous.

What is anaerobic coffee processing?

It's a fermentation method where ripe cherries sit in a sealed, oxygen-free tank before drying, rather than fermenting in the open air the way standard washed or natural processing does. The low-oxygen environment lets yeast and bacteria produce different flavor compounds than conventional fermentation.

What does anaerobic coffee taste like?

Expect riper, more intense fruit and fermentation character than a standard process — this lot shows honey, orange peel, and strawberry, with a heavier body and softer acidity than washed or conventionally natural-processed coffee from the same country.

Is anaerobic coffee natural or washed?

It can be either — anaerobic fermentation is an added step that happens before drying, and producers pair it with either a natural (dry, whole-cherry) or washed (pulped) finish afterward. This lot is anaerobic-natural, combining the sealed fermentation with Ethiopia's traditional whole-cherry drying.

What is carbonic maceration coffee?

It's a specific style of anaerobic processing borrowed from winemaking, where whole cherries ferment in a carbon-dioxide-rich, oxygen-free environment. The term entered coffee's vocabulary after a carbonic-maceration-processed lot won the 2015 World Barista Championship.

Why is anaerobic coffee so fruity and winey?

Fermenting without oxygen lets yeast and bacteria produce esters, organic acids, and alcohols that a standard, open-air fermentation doesn't develop to the same degree — those compounds are what give this processing style its riper, sometimes wine-like fruit character.

How should I brew this coffee to taste the fermentation character clearly?

Pour-over with a 1:16 ratio, a medium-fine grind, and water on the cooler side (195-200°F / 90-93°C) shows this lot's honey and strawberry notes clearly without pushing the orange-peel note into excess bitterness.