How Southeast Asia Roasts Its Coffee Differently

In many parts of Southeast Asia—especially Singapore and Malaysia—coffee isn’t treated with the same reverence as in Japan or Europe. Instead, local roasters use a very different approach: adding ingredients like salt, sugar, butter, or even lard during roasting to boost flavor, darken the roast, and cut costs. If you’ve ever tried a thick, sweet, almost burnt-tasting cup of ‘kopi’ in Kuala Lumpur or Singapore, you’ve had the result.

Here’s the key fact: these regional coffee roasts typically use a medium roast level, with around 30% sugar by weight of coffee beans added, and sometimes fats or salts too. The process is longer—30 to 45 minutes—and involves careful timing to avoid burning the sugar or over-roasting the beans.

What Is ‘Salted and Sugared’ Coffee Roasting?

In Singapore and Malaysia, traditional coffee roasting often involves mixing coarse salt, sugar, butter or vegetable oil, and sometimes even animal fats into the beans as they roast. This is done not just for flavor, but also to reduce production costs and create a stronger, darker, more intense brew. The technique is especially common in traditional 'kopi' production. Some producers in China’s Yunnan and Hainan regions have even gone further, adding eggs or lard.

How the Traditional Roast Process Works

The traditional roast starts like a normal medium roast, where moisture evaporates from the green beans. But then things diverge significantly:

• About halfway through the drying phase—when the beans still have some moisture left—around 0.5kg of salt is added per batch to reduce bitterness.
• Roasting continues until the beans are dry and turn light brown (roughly 10 minutes).
• Then, either butter or vegetable oil is stirred in.
• After that, white sugar is added and the heat is reduced. The sugar melts and coats the beans.
• The batch is stirred until the sugar crust is no longer sticky and the beans feel rough to the touch. Only then is the roast finished and cooled.

The ‘Kopi-Tiah’ or Stirred Sugar Method

Many modern producers in Singapore and Malaysia have refined this into a two-part process to avoid burning the sugar. Here’s how it works:

• Sugar is boiled separately in a large pan with a spiral agitator until it becomes syrup (known locally as ‘syrup’ or ‘’).
• Meanwhile, coffee beans are roasted to completion in another roaster.
• Once the beans are ready, the hot syrup is poured into the roasted beans and mixed quickly.
• The syrup adheres to the beans, turning them dark purple-black.
• Heat is cut immediately and the mixture is cooled with fans while being stirred manually.
• The final product cools into solid chunks, which are later broken into pieces—either by hand or using a V-shaped crusher.
• The resulting roasted coffee is known locally as ‘’ (pronounced similarly to ‘tiah’), a thick, black, sticky coffee grounds blend that’s deeply traditional.

This version creates a very dark, intense roast with a molasses-like sweetness and heavy body. But it’s a high-stakes process: get the heat wrong, and the result is either sour (under-roasted) or unpleasantly burnt and bitter (over-roasted).

Key Ratios and Roast Details

The standard coffee-to-sugar ratio used is 100:30 by weight—that is, 30% sugar by weight of coffee. More sugar means a darker, thicker product. Typical additions include:

• Salt: ~0.5kg per batch, added early to reduce bitterness
• Fats: butter or vegetable oil, added midway
• Sugar: 30% by weight, added late in roast

The total roast time is roughly 30–45 minutes. The final stage with sugar is done over low heat to let it melt without scorching. Proper cooling is critical—rapid manual stirring with fans is used to prevent clumping and burning.

Frequently Asked Questions

Why do Southeast Asian roasters add salt to coffee beans?

Salt is added—typically around 0.5kg per batch—during the early drying stage of roasting to reduce the inherent bitterness of raw coffee beans. This is a traditional method used in Singapore, Malaysia, and even some parts of China like Yunnan, aiming to balance flavors and improve perceived taste.

How much sugar is added during roasting in Singapore-style coffee?

Roasters in Singapore and Malaysia typically add sugar at a ratio of 30% by weight. That means for every 100 grams of green coffee beans, 30 grams of sugar are added during the roasting process, often after the beans have dried and started to brown.

What’s the 'kopi-tiah' or syrup method of coffee roasting?

The 'kopi-tiah' method involves boiling sugar into a syrup separately, then pouring it onto freshly roasted beans. The hot syrup sticks to the beans, turning them dark purple-black. This mixture is cooled quickly with fans while being stirred to prevent burning. The result is a thick, sticky, sweet, and very dark roasted coffee product.

Why is the roasting time so long for this style of coffee?

This style of coffee often requires 30–45 minutes of roasting due to the multiple stages involved: initial drying, salt addition, mid-roast fat addition, late-stage sugar coating, and slow melting under low heat. Each stage requires careful timing to avoid burnt flavors or underdeveloped roast.

Does adding fat like butter or oil affect the coffee roast?

Yes. Adding fats such as butter or vegetable oil during the mid-stage of roasting alters the texture, flavor, and color of the final coffee. These fats help create a richer, darker roast with a heavier mouthfeel, contributing to the characteristic boldness of traditional Southeast Asian coffees.

What happens if you roast this style of coffee too hot or too long?

Over-roasting or using too much heat causes the sugar to burn, leading to bitter, acrid flavors. Under-roasting results in sourness. Both mistakes ruin the balance of the brew. Cooling must also be carefully managed to avoid clumping or uneven roasts.

Recommended FrontStreet Beans for Medium Roast

For coffee lovers curious about medium roast profiles similar to those used in traditional Southeast Asian roasting—but without the sugar and salt—try FrontStreet’s Brazil Queen Manor (creamy, nutty, with chocolate and caramel sweetness), Strawberry Candy Espresso (fruity and sweet with orange and honey notes), or the 2013 Yunnan Sun-Dried Typica (balanced with roasted almond, brown sugar, and dried apricot). These beans highlight what a well-balanced medium roast can achieve without additional ingredients. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.