What Are the Flavor Characteristics of Costa Rica Fire Mountain Anaerobic Fermented Coffee? What Are the Steps in the Anaerobic Fermentation Process?

Anaerobic Fermentation Process

1. The flavor of coffee cherries is concentrated more in the mucilage than in the seeds.

2. Depending on cherry maturity, variety, seasonality, and water and soil conditions, different mucilages carry different levels of sweetness and quality — and each delivers its own flavors.

3. Fermentation converts sugars into various compounds and produces alcohol; the process also generates CO2, which gradually builds high pressure inside a sealed container. That pressure helps the seeds absorb flavor compounds from the mucilage.

4. Controlling temperature and time regulates the alcoholic fermentation.

5. pH value is a key reference indicator throughout fermentation.

In short, you need a fully sealed, monitorable stainless steel tank. Second, every cherry entering the tank must be fully mature, with sugar content up to standard and of sufficient quality. During fermentation, temperature and pH are strictly monitored — and the moment the sugars in the mucilage are just fully consumed, the tank is opened to stop fermentation and the coffee is rushed out to dry in the sun, avoiding over-fermentation.

Costa Rica · Volcán de Fuego · Anaerobic Fermentation

Product Name: Costa Rica · Volcán de Fuego

Origin: Costa Rica, Western Valley

Farm: El Socorro

Finca: Cordillera de Fuego (Volcano of Fire)

Farm Owner: Luis Eduardo Campos

Variety: Caturra

Altitude: 1400m

Processing Method: Anaerobic Fermentation

Flavor: Cinnamon, red apple, clove, mulled wine

FrontStreet Coffee Recommended Brewing Method

Recommended Brewing Method: Pour-over

Dripper: V60

Grind Size: Medium-fine

Water Temperature: 90±1°C

30g of water for the bloom, bloom time 30s

Segmentation: Pour to 120g, pause, then slowly pour to 225g

In other words: 30-120-225g.

FrontStreet Coffee Recommendation

If this spicy, fruit-forward anaerobic profile sounds like your kind of cup, FrontStreet Coffee has more high-sweetness options worth exploring. Costa Rica made its name on honey processing: cherries are floated and sorted, then depulped with the mucilage left on the bean for sun drying. Black honey keeps the most mucilage and ferments the deepest, so it's the sweetest of all — the FrontStreet Blackberry, a high-altitude Costa Rican single origin roasted medium-light, brews up with sweet florals, grape, sweet orange, and liqueur-chocolate flavors.

For another take on intense sweetness, the FrontStreet Boundary Estate Sidra (Xijao), roasted medium-light, offers chocolate with a light spice sweetness, notes of grape, apricot, passion fruit, and candy-like fruit aroma, a winey finish, and beautifully layered complexity — great over ice as a sparkling, grape-juice-like iced Americano, perfect for anyone who loves big fruit but skips the bitterness.