How Southeast Asia Roasts Its Coffee Differently

In Singapore and Malaysia, coffee isn’t just brewed—it’s often roasted with ingredients you wouldn’t expect. If your cup tastes unusually dark, thick, and sweet with a hint of salt, you’re likely drinking a local-style roast. But how exactly is this coffee made, and why does it turn out so different from what you’d expect in a specialty shop? Let’s break down the traditional roasting practices of Southeast Asia.

The short answer: Traditional coffee in Singapore and Malaysia is typically medium-roasted (30–45 minutes), then mixed with salt, butter or lard, and sugar—often in a second step—to create a thick, dark, and sticky brew known locally as 'zhi zhi' coffee. The common coffee-to-sugar ratio is 100:30, meaning 30% sugar by weight of coffee beans.

What Is 'Zhi Zhi' Coffee?

In Singapore and Malaysia, 'zhi zhi' coffee refers to a style of roasted coffee that is heavily processed with additives during or after roasting. Unlike Western-style specialty roasting—which highlights origin character and clean flavors—this method uses salt, butter or lard, and sugar to create a bold, intense, and sweet-dark cup. The goal isn’t clarity or acidity, but richness, body, and a long-lasting, hearty brew that stands up to milk and sugar.

Why Add Salt, Butter, and Sugar?

Local roasters add these ingredients for specific reasons: salt reduces bitterness and perceived harshness in the raw beans; butter or lard (such as vegetable oil or cow fat) adds body and smoothness; and sugar contributes sweetness and creates a thick, sticky texture. These additions also help lower costs compared to using high-quality beans alone. In some cases, even more unusual ingredients like eggs or lard have been reported in parts of China’s Yunnan and Hainan, showing regional parallels in traditional processing.

How Traditional Coffee Is Roasted in Southeast Asia

The traditional roasting process unfolds in several stages:

• Initial Roast: Coffee beans are roasted medium (around 30–45 minutes), with careful heat control to drive off moisture and begin Maillard reactions. This base roast is similar to standard commercial practices but without specialty-level precision.
• Adding Salt: About half a kilogram of salt is introduced when the beans are losing initial moisture. The salt helps reduce bitterness and is a key flavor modifier.
• Finishing the Roast: Roasting continues until the beans dry out and turn brownish (about ten more minutes). At this point, fats such as butter or vegetable oil are added and mixed thoroughly.
• Sugar Addition: After fats are incorporated, sugar is added and the heat is reduced. The sugar melts and coats the beans. Roasting continues until the sugar coating is no longer sticky to the touch and the beans feel rough. Then the batch is cooled.

Alternatively, many modern producers in Singapore and Malaysia have shifted to a separated sugar-coating step: sugar is boiled into syrup in a separate pan, then mixed into freshly roasted beans. The mixture quickly adheres, turning the beans dark purple or black. This sticky blend is then rapidly cooled with fans while being stirred manually. Once hardened, it’s crushed into chunks or flakes. This final product is what locals call 'zhi zhi' coffee—thick, black, and intensely flavorful.

Key Ratios and Technical Details

• Roast time: 30–45 minutes total
• Salt added: ~0.5 kg during early moisture evaporation phase
• Fat added: butter or vegetable oil after beans dry
• Sugar ratio: 100 parts coffee to 30 parts sugar by weight
• Cooling method: fan or hand stirring after syrup coating

The sugar-to-coffee ratio is critical: more sugar leads to a darker, thicker product. Over-roasting results in burnt, bitter flavors, while under-roasting can leave the coffee sour. The final roasted beans are oily, sticky, and nearly black in color.

What Can Go Wrong?

Several factors affect the outcome:

• Using high heat when adding sugar causes burning and off-flavors.
• Poor ventilation can cause chaff to catch fire, ruining the batch.
• Inconsistent cooling leads to uneven textures.
• Incorrect sugar ratios alter both flavor and shelf stability.

The process demands attention to detail, especially when managing heat and timing. The thick smoke produced during sugar coating is also notoriously hard on the roaster’s environment.

Frequently Asked Questions

What is 'zhi zhi' coffee?

'Zhi zhi' coffee is a traditional Southeast Asian style of roasted coffee, typically from Singapore or Malaysia, that is roasted with salt, butter or lard, and sugar. The process creates a dark, thick, sticky, and intensely sweet and savory coffee bean that’s distinct from specialty roasts.

Why do Southeast Asian roasters add salt to coffee?

Salt is added during the roasting process to reduce bitterness and harshness in the raw coffee beans. It modifies flavor perception and is a traditional cost-saving and flavor-enhancing technique in the region.

What ratio of sugar is used in traditional Malaysian or Singaporean coffee roasting?

The typical coffee-to-sugar ratio is 100:30 by weight—meaning 30% sugar is added to the coffee beans during or after roasting, contributing to the dark color and sweet, sticky texture.

How is sugar added in the modern 'zhi zhi' method?

In many modern versions, sugar is boiled into syrup separately, then poured over freshly roasted beans. The hot syrup coats the beans quickly, and the mixture is cooled rapidly with fans while being stirred to create a sticky, clump-forming final product.

What happens if you roast too long or too hot with sugar?

Over-roasting or using too much heat while adding sugar causes the sugar to burn, leading to bitter, acrid flavors and a poor-quality final cup. Precise temperature and timing are essential to avoid ruining the batch.

Does 'zhi zhi' coffee use specialty-grade beans?

The traditional 'zhi zhi' method often prioritizes quantity, cost control, and strong flavor over specialty-grade quality. While any bean can be used, the additions of salt, fat, and sugar mask origin characteristics typical of single-origin or specialty profiles.

Recommended FrontStreet Beans for Exploring Roast Balance

For coffee lovers curious about the impact of roast style, try FrontStreet’s Brazil Queen Manor (medium roast, creamy and sweet with chocolate and caramel notes), Strawberry Candy Espresso (medium roast, juicy with orange, honey, and soft sweetness), or the Jamaica Blue Mountain No.1 (medium roast, balanced with chocolate, nuts, and cream). These beans showcase how roast level shapes flavor—without the salt, sugar, or fat used in traditional 'zhi zhi' roasting. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.