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Green coffee beans are the primary raw material that determines the quality of every roasted coffee product. Flavor profile, roasting consistency, and commercial value are all directly influenced by the quality of the beans before processing.

As a company operating in the coffee industry, VCU understands that selecting and controlling the quality of green coffee beans plays a crucial role in creating products that meet high standards. Let’s explore in detail this raw material, often considered the “heart” of the coffee industry.

What are green coffee beans?

Green coffee beans, also known as unroasted coffee beans, are the seeds found inside coffee cherries. After harvesting, the fresh cherries undergo processing to completely remove the outer skin, fruit pulp, and parchment layer. The beans are then dried through sun-drying or mechanical drying methods to obtain the green coffee beans.

The most important characteristic of green coffee beans is that they remain in their natural, raw state and have not undergone any roasting process.

Why are they considered the “Heart” of a cup of coffee?

Every flavor developed during roasting originates from the quality of the raw material. A roaster can optimize the roasting profile, but cannot transform low-quality coffee beans into a premium product.

Green coffee beans contain essential compounds such as sugars, proteins, lipids, caffeine, and organic acids. During roasting, these compounds participate in chemical reactions that create coffee’s distinctive aroma, sweetness, acidity, and aftertaste.

Characteristics of green coffee beans

Green coffee beans possess unique characteristics in terms of shape, color, and internal composition. These factors are also critical for roasters, buyers, and exporters when evaluating raw material quality before production.

Shape and color of coffee beans

Green coffee beans are typically oval-shaped with a distinctive center groove. Compared to roasted coffee beans, they are harder, exhibit a green to yellowish-green color, and have little to no noticeable aroma.

High-quality green coffee beans usually display uniform color, minimal defects, and relatively consistent size. These are important indicators for assessing initial raw material quality.

Internal composition of coffee beans

Green coffee beans contain numerous valuable components:

• Caffeine contributes to the characteristic bitterness.
• Organic acids provide natural acidity.
• Carbohydrates and sugars create lingering sweetness.
• Proteins participate in the Maillard reaction during roasting.
• Lipids contribute to aroma formation.

The balance of these components directly affects the sensory quality of the final roasted product.

The journey from coffee cherry to green coffee bean

Coffee cherry harvesting

To produce high-quality green coffee beans, harvesting plays a vital role. Properly ripened coffee cherries generally contain higher sugar content, helping enhance flavor quality after processing.

Today, many coffee-growing regions apply selective picking methods to improve product quality and reduce defective bean rates.

Common processing methods

There are several methods of processing green coffee beans, with the most common including:

Natural Process: Coffee cherries are dried whole before the outer layers are removed. This method often produces pronounced sweetness and rich fruity flavor notes.

Washed Process: The fruit pulp is removed before fermentation and washing. The resulting coffee offers a cleaner flavor profile, more defined acidity, and greater consistency.

Honey Process: A portion of the mucilage is retained on the beans during drying, creating a balance between sweetness and flavor clarity.

Grading and storage

After processing, green coffee beans are graded based on size, density, color, and defect count. This is a crucial step in ensuring consistency before roasting or export.

Popular types of green coffee beans today

Robusta Green Coffee Beans

Robusta is the most widely cultivated coffee variety in Vietnam. This type of green coffee bean is known for its high caffeine content, strong bitterness, and full body.

Thanks to its excellent adaptability to tropical climates, Robusta currently accounts for the majority of Vietnam’s green coffee bean export volume.

Đọc thêm: Robusta Green Beans Coffee 

Arabica Green Coffee Beans

Arabica is highly valued for its complex aroma, bright acidity, and sweet aftertaste. This type of green coffee bean is commonly found in premium and specialty coffee products.

In Vietnam, Arabica is mainly cultivated in Da Lat, Son La, and other high-altitude regions with cool year-round climates.

Đọc thêm: Arabica Green Beans Coffee

Culi Green Coffee Beans

Culi coffee is distinguished by its intense aroma, strong flavor, and high caffeine content. This type of green coffee bean is often used to create coffee products with distinctive flavor profiles.

In Vietnam, Culi beans are carefully selected from high-quality coffee-growing regions and possess high commercial value due to their naturally low occurrence rate.

Đọc thêm: Culi Robusta

Excelsa Green Coffee Beans

Excelsa is a variety closely related to Liberica and is commonly known in Vietnam as Jackfruit Coffee. This type of green coffee bean is distinguished by its unique aroma, mild acidity, and long-lasting aftertaste, setting it apart from many other coffee varieties.

Thanks to its strong adaptability to dry climate conditions and high resistance to environmental stress, Excelsa is often used in coffee blends to enhance flavor complexity and add distinctive characteristics to the final coffee product.

Đọc thêm: Excelsa Green Coffee Beans

Criteria for evaluating green coffee bean quality

Độ ẩm tiêu chuẩn

Moisture content is a critical factor in evaluating and storing green coffee beans. The ideal moisture level generally ranges from 10% to 12%.

Excessively high moisture content can increase the risk of mold growth, reduce quality, and negatively affect the roasting process.

Bean size and density

Lots of green coffee beans with consistent size generally provide more stable roasting performance. In addition, high bean density is often an indicator of well-developed beans with greater flavor potential.

Defect and foreign matter rate

Green coffee bean quality is also evaluated based on the proportion of defects, such as black beans, broken beans, insect-damaged beans, and foreign materials.

The lower the defect rate, the higher the commercial value of the lot, while also helping businesses optimize production efficiency.

The role of green coffee beans in roasting and export

For roasting operations

The quality of green coffee beans directly influences roasting results. Beans that are consistent in size, moisture content, and density enable roasters to control heat more effectively, resulting in products with stable flavor profiles.

This is why roasting companies always prioritize sourcing high-quality raw materials with clear traceability.

For export activities

Vietnam is currently one of the world’s largest coffee-exporting countries. Green coffee beans account for a significant share of the industry’s total export value.

Improving the quality of green coffee beans not only increases product value but also strengthens the position of Vietnamese coffee in the global market.

How to properly store green coffee beans according to standards

Ideal storage conditions

To maintain quality, green coffee beans should be stored in a dry, well-ventilated environment away from direct sunlight. Storage facilities must be humidity-controlled to minimize the risk of mold development.

Additionally, beans should be stored in appropriate packaging and placed on pallets to avoid direct contact with the warehouse floor.

Common mistakes to avoid

Some common mistakes when storing green coffee beans include:

• Storing beans in high-humidity environments.
• Allowing direct contact with soil or concrete floors.
• Storing near sources of strong odors.
• Failing to conduct regular quality inspections.

These factors can significantly reduce raw material quality.

VCU Perspective

From harvesting, processing, grading, to storage, every stage directly impacts the quality of green coffee beans. They are not only the primary raw material of the roasting industry but also a decisive factor influencing flavor, commercial value, and market competitiveness.

At VCU, we understand that quality always begins with raw materials. Selecting and controlling the quality of green coffee beans is the foundation for creating consistent coffee products that meet the demands of both domestic and international markets.

We hope this article has answered your question, “What are green coffee beans?”. If you have any questions or would like further information, please do not hesitate to contact us.

Thông tin liên hệ

Công ty Cổ phần VCU (VCU JSC)

Địa chỉ:
Xưởng rang: Thôn 4, xã Chư Prông, Tỉnh Gia Lai
Nhà máy nhân xanh: Làng Ia Tong, xã Ia Hrung, tỉnh Gia Lai
– Fanpage: VCU – Vietnam Coffee United

– Email: info@vietnamcoffeeunited.com