Cold Brew Coffee: What is the definition and how do you make cold brew coffee?

A staple in coffee culture for generations, cold brew coffee has captured the attention of coffee enthusiasts and casual drinkers alike for decades. From the early days of traditional Japanese slow-drip methods to the explosion of ready-to-drink bottles lining refrigerator shelves at every corner store, the concept of extracting coffee without heat has been a source of experimentation and devotion.

Cold brew coffee represents a brewing method where coffee grounds steep in cold or room temperature water for an extended period, typically 12 to 24 hours. This process creates a coffee concentrate that can be diluted with water, milk, or served over ice. Unlike hot brewing methods that use heat to quickly extract flavors, cold brew relies on time to produce a smooth, less acidic beverage that has transformed how millions of people consume their daily caffeine.

What is the definition of Cold Brew Coffee?

Cold brew coffee represents a category of coffee preparation that produces beverages through extended steeping of coarsely ground coffee beans in cold or room temperature water. This method includes creating concentrate from extended immersion, understanding the chemistry behind extraction, developing ratios for dilution, achieving flavor balance, and perfecting serving techniques. From neighborhood cafes to home kitchens, cold brew is reshaping coffee consumption habits, and its popularity continues to grow.

“Coffee brewing is about extracting the compounds you want from the bean while leaving behind what you don’t,” said Marcus Chen, Head of Coffee Development for Portland’s Cascade Coffee Academy and instructor for their professional barista certification program. “In traditional coffee brewing, we can use heat and pressure to control extraction precisely. However, there are compounds in coffee that become harsh or bitter when extracted with heat. So, to me, the method of cold brewing is a set of techniques that have been refined over time to extract the sweet, nuanced flavors from coffee even when we can’t rely on the speed and efficiency that heat provides.”

One pivotal moment in the modern appreciation of cold brew came in the 1960s with the innovation of Toddy, a chemical engineer named Todd Simpson. After experiencing smooth, low-acid coffee in Guatemala, Simpson developed the Toddy brewing system and explored the scientific principles behind cold extraction, questioning why coffee had to be brewed hot when time could achieve similar results with different flavor outcomes. This marked a crucial step in the journey from niche preparation method to mainstream coffee option.

Unlike conventional coffee brewing that relies on hot water to rapidly dissolve coffee compounds, cold brew systems extract flavors slowly through diffusion, creating a fundamentally different chemical profile in the finished beverage. This ability to produce distinct flavor characteristics through time rather than temperature is a key aspect that sets cold brew apart from traditional brewing.

How does cold brew coffee work?

Cold brew coffee works by utilizing time, water temperature, and coffee-to-water ratios to extract soluble compounds from ground coffee beans. The goal is to create a beverage that highlights sweetness and body while minimizing the harsh acids and bitter compounds that high-temperature brewing typically extracts.

Cold Brew Methods

Cold brew coffee comprises various methods and approaches, each producing specific flavor profiles or serving particular preferences. Although brewing methods often overlap and experimental approaches are common, below are some of the major methods of cold brew preparation:

Immersion Method: The immersion approach focuses on steeping coarsely ground coffee in cold water for 12 to 24 hours in a container or brewing vessel. The primary goal of immersion is to allow complete saturation of grounds and consistent extraction throughout the batch, resulting in a concentrate that gets diluted before serving.

Slow-Drip (Kyoto-Style): This method focuses on brewing that originated in Japan, where cold water drips slowly through a bed of coffee grounds over several hours. These systems consist of three chambers with the drip rate controlled to allow precise extraction timing. Slow-drip has been particularly successful in producing clean, tea-like coffee with bright, delicate notes.

Cold Brew Concentrate vs. Ready-to-Drink: This distinction focuses on whether the final product requires dilution or can be consumed immediately. This differentiation is crucial for commercial applications, home brewing ratios, serving size calculations, and shelf-life considerations.

Nitro Cold Brew vs. Still Cold Brew

There are two different types of cold brew serving styles, particularly in terms of texture and mouthfeel. These concepts help distinguish the experience that different preparation and serving methods provide.

Still Cold Brew: Coffee that has been cold-brewed and served without additional modification, maintaining the smooth, naturally sweet character produced by the cold extraction process. It delivers robust flavor in applications like straight servings over ice, mixing with milk or cream, and creating iced coffee drinks.

Nitro Cold Brew: Cold brew infused with nitrogen gas, creating a cascading effect and creamy texture without any dairy. It’s a specialized serving style where the beverage develops a dense, foamy head similar to draft beer. Current examples can be found at specialty coffee shops, such as Stumptown Coffee Roasters and independent cafes with tap systems.

Jobs in Specialty Coffee

The specialty coffee industry is expected to grow substantially as consumer preferences shift toward premium, craft beverages, leading to demand for professionals with expertise in various domains. The Specialty Coffee Association reports that the specialty coffee market has grown at a compound annual growth rate of 12% and the cold brew segment specifically is projected to expand significantly through 2030.

Here are some potential roles in specialty coffee:

Head Roaster ($65,000 average salary)
Coffee Buyer/Green Coffee Trader ($58,000 average salary)
Quality Control Manager ($72,000 average salary)
Cafe Manager ($48,000 average salary)
Barista Trainer ($45,000 average salary)
Coffee Equipment Technician ($52,000 average salary)
Cold Brew Production Manager ($61,000 average salary)
Wholesale Account Manager ($55,000 average salary)
Coffee Product Developer ($68,000 average salary)

Education in Specialty Coffee

Individuals looking to enter the specialty coffee industry should consider pursuing professional certifications and hands-on training. A Specialty Coffee Association (SCA) certification pathway can open career opportunities in various sectors where coffee quality and preparation expertise are increasingly valued.

Cascade Coffee Academy’s professional barista program offers opportunities to immerse yourself in the technical and sensory world of specialty coffee. The program’s core courses help students develop their understanding of coffee chemistry, extraction theory, brewing techniques and quality assessment. They apply this knowledge more deeply in modules covering espresso preparation, milk steaming fundamentals, cold brew production systems, and sensory evaluation protocols.

Teaching the academy’s intermediate brewing course, Marcus Chen believes cold brew represents an accessible yet sophisticated brewing method that can help individuals in all coffee roles understand extraction principles. “Whether you’re perfecting recipes for a cafe menu or thinking about how to scale cold brew production for distribution, there’s a fundamental understanding of the variables involved that is extremely valuable.”

What are the current trends in cold brew?

Staying on top of current cold brew trends is imperative to understanding the evolving preferences shaping coffee culture. There are several notable trends that are influencing the direction of this brewing method. Chen is intrigued by the possibility of witnessing cold brew applications that address specific consumer demands. Although we have seen cold brew techniques work well in standard cafe settings, Chen says we have not seen many tackle the challenges of consistent quality at industrial production scale.

“A cold brew trend that I’m observing is the integration of classic immersion techniques with modern filtration technology and figuring out the production solutions to make those two approaches work seamlessly at volume,” said Chen.

Here are some other noteworthy cold brew trends to keep a close eye on:

Sustainable Sourcing and Production: While the specialty coffee field advances rapidly, roasters and cafes are working together to establish relationships, standards, and supply chains to ensure coffee is sourced and brewed with environmental and social responsibility.

Flash Brew Innovation: As we have seen with Japanese iced coffee methods, brewing hot directly onto ice is producing remarkably bright, aromatic cold coffee. These techniques have applications in quick-service environments, single-serve preparation, and highlighting origin characteristics.

Functional Cold Brew: With the emergence of health-conscious consumers, cold brew has the potential to be a carrier for additional benefits and it’s essential that these enhanced beverages maintain coffee’s core appeal. We will continue to see brands adding protein, vitamins, adaptogens, or reducing sugar content to meet consumer wellness expectations.

RTD Market Expansion: While we watch cold brew transform retail beverage sections, this category will be creating significant opportunities in package design, shelf-stable processing innovations, and distribution partnerships with convenience stores, grocery chains, and online delivery platforms.