What's the Skinny on Advanced Processing?

Advanced coffee processing applies precise biochemical interventions—borrowed heavily from winemaking and brewing—to manipulate fermentation pathways, sugar breakdown, and enzymatic activity, transforming the green bean's final flavor chemistry. The final products are generally rich with fragrances and flavors that lean into natural fruits and florals.  

• Anaerobic Fermentation: Whole cherries or pulped beans ferment in sealed, oxygen-depleted stainless steel tanks or food-grade barrels fitted with one-way release valves. The absence of oxygen restricts oxidative spoilage and promotes anaerobic microbes.
• Carbonic Maceration (CM): Adapted from winemaking, intact cherries are placed in hermetically sealed tanks flushed with carbon dioxide ($CO_2$). The pressurized, oxygen-free environment encourages intracellular fermentation inside the cherry skin before microbes break it open.
• Thermal Shock: Developed to fix specific flavor compounds into the seed, coffee undergoes a hot-water fermentation bath (around 40°C–50°C) to open cellular structures and accelerate microbial activity, followed immediately by an ice-cold wash (10°C–12°C) to arrest fermentation and trap volatile aromatic compounds.
• Koji Fermentation: Whole cherries or depulped coffee are inoculated with Aspergillus oryzae (the mold used in sake and soy sauce). Koji’s enzymes quickly hydrolyze complex starches into fermentable simple sugars, accelerating secondary bacterial fermentation and boosting umami and sweetness.
• Co-fermentation (Infused Processing): Producers add whole fruits, fruit purees, spices, herbs, or essential oils directly into the anaerobic tanks alongside the coffee, allowing the porous bean structure to absorb aromatic esters and terpenes.

YEASTS AND FLAVOR

Producers primarily inoculate tanks with cultured wine and brewing strains of Saccharomyces cerevisiae (such as LALCAFE Oro or Intenso) to reliably amplify clean stone fruit, floral, and bright berry notes through vigorous ester production. To layer in deeper complexity, non-Saccharomyces yeasts like Torulaspora delbrueckii are introduced for heavier mouthfeel and tropical accents, while ester-hyper-producers such as Pichia kluyveri generate intense passionfruit, pear, and confectionery banana profiles. When paired with lactic acid bacteria (Lactobacillus), the fermentation softens sharp malic tartness into a velvety, yogurt- or butter-like body, whereas propagated indigenous wild yeasts enhance distinct fruitiness and sweetness while preserving regional farm terroir. 

• Amplified Acidity: Higher concentrations of malic, phosphoric, and lactic acids shift profiles toward crisp green apple, stone fruit, and bright tropical highlights.
• Enhanced Body and Sweetness: Extensive mucilage breakdown yields complex soluble solids and sweet esters, producing heavy, syrupy, or silky mouthfeels.
• Unconventional Tasting Notes: Distinct boozy, fermented wine, bubblegum, cinnamon, passionfruit, and candied fruit profiles rarely seen in traditional washed coffees.
• Clarity Trade-offs: While wild, untamed lots can tilt toward over-fermented, medicinal, or compost-like defects, precise control produces high clarity alongside wild fruit intensity.