In this article, you’ll learn:
- Why processing method matters more than origin when choosing coffee beans for cold brew
- How roast profile protects the flavour built into anaerobic process coffees
- What nitrogen infusion adds to texture, and how cafés can build a nitro programme
Cold brew and nitro coffee have moved from novelty to necessity on specialty menus. The beans behind a great pour matter as much as the equipment pouring it.
Adi Nugraha, Head of Coffee at Project Almanac Coffee Company in South Jakarta, curates coffees with clarity and complexity as guiding principles. His approach to sourcing, roasting, and serving cold brew offers a practical framework for any café or roastery building out a nitro programme.
We spoke to him to understand his approach to choosing coffee beans for cold brew, the roasting logic behind it, and the role nitrogen plays in shaping the final cup. Read on for his insights.
Which coffees suit cold brew and nitro?
Choosing coffee beans for cold brew starts with the processing method, which often has a greater influence on cold extraction than origin alone, since it shapes the sugars, acids, and aromatic compounds available for extraction.
Selecting beans for cold extraction means understanding how a coffee was processed at the mill, rather than chasing a specific origin. Cold brewing pulls from that processing profile very differently than hot water does. Cold extraction happens slowly and at low temperature. It favours sweetness and body, and leaves behind more of the sharper acidity and bitterness that hot brewing readily extracts.
For roasters building a cold brew programme, this means origin alone is a poor predictor of how a coffee will perform. Two beans from the same region can behave completely differently in a cold extraction, depending on how the mill processed them at source.
Adi’s curation reflects that reality directly. When choosing coffee beans for cold brew, Adi starts with process rather than sourcing by country or region first. Anaerobic lots are consistently his top choice for cold brew and iced preparations. He explained the logic behind that preference clearly:
“We believe that anaerobic process works really well for cold brew profiles, or for manual brew products served with ice, commonly known as Japanese Iced. For hot brewing, we usually prefer natural or even washed process coffees.”
That contrast is a useful planning tool for any café building a dual hot and cold menu. Natural and washed coffees have more conventional sugar and acid structures. They respond well to the higher temperatures and faster extraction of hot brewing, where their character comes through clearly without extended contact time.
Anaerobic coffees behave differently. The low-oxygen fermentation gives them denser, more layered flavour compounds that need a gentler, slower process to unfold, which is exactly what cold extraction provides.
Alongside anaerobic processing, Adi also points to carbonic maceration and co-fermentation as processes worth building a nitro offering around. Both produce unusually vivid, high-character cups.
This standard for choosing coffee beans for cold brew comes down to a simple idea, in Adi’s own words:
“Make sure the coffee you choose has a unique flavour character. For example, coffees with anaerobic process, carbonic maceration, or even the currently trending co-fermented process. I believe people will really enjoy those.”
How does roast profile shape a cold brew?
Roast profile is the next piece of choosing coffee beans for cold brew, since it decides whether processing’s complexity survives into the cup.
Bean selection only accounts for part of the outcome. Roast profile determines whether that complexity reaches the final cup or gets lost along the way. Adi applies the same light roast approach to cold brew that he uses for filter coffee, and he is particularly deliberate about this with anaerobic lots. His reasoning centres on preservation rather than transformation:
“So far we are still using the same approach we use for filter coffee: light roast, especially for coffees with an anaerobic process. That’s because we try not to lose the complexity of flavour in the coffee.”
A lighter roast limits caramelisation and the structural breakdown that heat causes inside the bean. More delicate aromatic and flavour compounds from anaerobically fermented coffee stay intact once the coffee reaches the cup. Anaerobic processing also tends to leave coffees with comparatively high natural sugar content. That gives Adi an additional reason to stay light rather than push toward a heavier roast:
“We also believe that anaerobic process coffees already have a relatively high sugar content compared to natural or washed process.”
Pushing an anaerobic coffee into a medium or dark roast works against everything the process aims to achieve. It converts hard-won sugars and delicate aromatics into generic roast flavour, rather than showcasing what makes the coffee distinctive.
This same logic guides Project Almanac’s approach to choosing coffee beans for cold brew across every processing style. When applied to a cold brew programme, that philosophy means choosing beans that can stand on their own character. Roasters then need to roast them in a way that protects, rather than overwrites, that character through slow cold extraction.
What does nitrogen add, and how should cafés build their offering?
Nitrogen is the final piece of choosing coffee beans for cold brew, turning a well-processed, well-roasted coffee into a standout pour.
Nitrogen infusion changes the physical character of cold brew before drinkers even taste a single flavour note. Tiny nitrogen bubbles create a dense, cascading, creamy texture and a naturally perceived sweetness, similar in mouthfeel to a stout beer, without any added sugar.
That textural shift matters because mouthfeel directly influences how drinkers perceive a coffee’s underlying flavours on the palate. A smoother, rounder texture can enhance the perception of sweetness, body, and complexity more than they might in a rougher, unfiltered pour.
Adi sees nitrogen as a genuine advantage over hot brewing in this respect, where certain textural qualities are harder to control:
“Sometimes with hot brewed coffee it’s hard to get rid of roughness in the texture, and this is where cold brew made with nitrogen really shines. It becomes an added value.”
For cafés choosing coffee beans for cold brew and building out a nitro line, the practical takeaway is straightforward: lead with distinctive, high-character coffees rather than commodity-grade blends. A nitro cold brew system like Hardtank faithfully delivers whatever character the underlying coffee brings. The sourcing and roasting decisions above carry through directly into the final pour, and the format does not mask them.
This is where equipment becomes part of delivering the intended flavour profile rather than just a delivery mechanism. A nitro cold brew coffee machine such as Hardtank’s helps reproduce the flavour clarity established through careful bean selection and roasting.
Consistent, repeatable extraction removes the batch-to-batch variability that can flatten a carefully sourced coffee’s character. Integrated nitrogen dispensing delivers the smooth, stout-like mouthfeel Adi describes, without requiring separate charging equipment or manual intervention.
Commercial nitro cold brew machines scale from single-café service through kegged and ready-to-drink formats. Roasters can extend the same anaerobic, carbonic maceration, or co-fermented lots that shine on a café menu into bottled or canned products, using custom coffee can packaging built for RTD launches. They keep the texture and clarity that made those lots worth featuring in the first place.
Choosing coffee beans for cold brew starts with understanding what processing and roasting bring to a cold extraction. It ends with equipment capable of delivering on that potential consistently, pour after pour, batch after batch, regardless of scale.
Choosing coffee beans for cold brew: key takeaways
- Processing shapes a coffee’s cold brew potential more than origin does, and Adi favours anaerobic lots for cold brew and Japanese Iced.
- When choosing coffee beans for cold brew, a light roast protects the complexity and sugars that anaerobic processing builds into the bean, keeping that character intact through cold extraction.
- Nitrogen infusion smooths rough texture and creates a creamy mouthfeel, letting distinctive, high-character coffees shine in the final pour.
Choosing coffee beans for cold brew: FAQ
Why do anaerobic process coffees work well for cold brew?
Choosing coffee beans for cold brew starts with process, and anaerobic fermentation tops Adi’s list for exactly this reason. It develops denser, more layered flavour compounds that need a slow extraction to unfold. Cold brewing gives those compounds exactly the gentle process they need.
Why does Project Almanac use a light roast for anaerobic cold brew?
A light roast limits caramelisation and preserves the complexity and high sugar content that anaerobic processing builds into the bean. Adi applies this same approach to filter coffee, so cold extraction can showcase the coffee’s flavour rather than lose it to a heavier roast.
What does nitrogen add to cold brew coffee?
Nitrogen infusion creates a dense, creamy texture and a natural sweetness, without any added sugar. Choosing coffee beans for cold brew is only complete once nitrogen enters the picture, smoothing rough texture into a mouthfeel similar to a nitro cold brew coffee maker‘s stout-like pour.
