How To Make Thai Coffee

If you want to learn how to make Thai coffee, you’re in the right place. This iconic drink is a perfect balance of bold and sweet. Thai coffee is characterized by its strong brew, sweetened condensed milk, and often a hint of spice.

It’s a street food staple that you can easily recreate at home. With a few key ingredients and simple steps, you can enjoy this rich beverage anytime.

This guide will walk you through everything you need. We’ll cover traditional methods, modern shortcuts, and expert tips for the best flavor.

The classic method for making Thai coffee involves brewing strong coffee with a unique filter. The result is a concentrated brew that forms the base of the drink. While you can use different tools, the traditional approach gives it an authentic taste.

Here is what you’ll need to get started.

Essential Ingredients And Equipment

Gathering the right components is the first step to success. The ingredients are simple, but each plays a crucial role in creating the signature taste.

Key Ingredients

Thai Coffee Beans or Grounds: Traditionally, a dark roast robusta bean is used. It has a strong, bitter, and earthy flavor that stands up to the sweetness. If you can’t find specific Thai coffee, use a dark roast robusta or a bold arabica blend.
Sweetened Condensed Milk: This is non-negotiable. It provides the distinctive creamy sweetness. Do not substitute with evaporated milk or regular milk and sugar.
Evaporated Milk (Optional): Sometimes added for extra creaminess on top of the condensed milk.
Spices (Optional): Cardamom, tamarind, or star anise are sometimes added to the coffee grounds before brewing for a subtle, aromatic complexity.
Ice: For the popular iced version, known as Oliang.

Necessary Equipment

Thai Coffee Filter (Sock Filter or Tungdtom): This is a cloth bag or a metal filter on a stand. It brews coffee slowly, creating a strong, smooth concentrate. A small fine-mesh sieve or a pour-over cone can work in a pinch.
Pot or Kettle: For boiling water.
Glass or Mug: Traditionally served in a clear glass to show the beautiful layers.
Long Spoon: For stirring.

The Traditional Brewing Method Step-by-Step

This process makes a coffee concentrate that is the heart of authentic Thai coffee. Take your time with the brewing for the best results.

Prepare the Filter: If using a cloth sock filter, rinse it with hot water to clean and warm it. Place it over your pot or carafe.
Add Coffee and Spices: Place 4-5 tablespoons of medium-coarse ground coffee into the filter. If you’re using spices, add a small pinch of crushed cardamom or a piece of star anise to the grounds now.
Bloom the Coffee: Slowly pour just enough hot water (about 200°F) over the grounds to wet them completely. Let it sit for 30 seconds to allow the coffee to “bloom.”
Slow Brew: Gradually pour more hot water in a circular motion over the grounds. Let the water drip completely through before adding more. The entire process for one serving should take about 3-5 minutes. This slow extraction is key for strength without excessive bitterness.
Create the Base: While the coffee brews, add 1.5 to 2 tablespoons of sweetened condensed milk to the bottom of your serving glass.
Combine and Stir: Once brewed, pour the hot coffee concentrate over the condensed milk. Stir vigorously until the milk is fully dissolved and a frothy layer forms on top.

How To Make Thai Iced Coffee (Oliang)

This is the most refreshing and popular way to enjoy Thai coffee, especially on a warm day. The method is simple but effective.

Follow the traditional brewing steps 1-4 to make a strong coffee concentrate.
Fill a tall glass completely with ice cubes.
Pour 1.5 to 2 tablespoons of sweetened condensed milk over the ice.
Slowly pour the fresh, hot coffee concentrate over the ice and milk.
Stir well to combine, chill, and create a creamy texture. The hot coffee will melt some ice, perfectly diluting the concentrate.
For an extra touch, you can top it with a splash of evaporated milk.

Alternative Methods Without Special Equipment

Don’t have a Thai filter? You can still make a great version with common kitchen tools. The goal is to produce a strong, clean brew.

Using a French Press

Use a coarse grind. Add 6 tablespoons of coffee (and optional spices) to your French press.
Pour 1.5 cups of hot water (200°F) over the grounds. Stir gently.
Place the lid on with the plunger up. Let it steep for 4-5 minutes.
Press the plunger down slowly and pour the coffee immediately to avoid over-extraction.
Mix with condensed milk as directed.

Using a Moka Pot

A Moka pot makes a strong, espresso-like coffee that works well. It’s a good substitute for the concentrated brew.

Fill the bottom chamber with hot water. Fill the filter basket with finely ground coffee, but do not tamp it down.
Assemble the pot and place it on medium heat.
Once the coffee starts to gurgle into the top chamber, remove it from the heat and run the base under cool water to stop the brewing.
Combine this strong coffee with condensed milk. You may need to use a bit less coffee per serving as it can be very potent.

Choosing The Right Coffee Beans

The bean choice dramatically impacts your final drink. While robusta is traditional, you have options based on availability and preference.

Traditional Thai Robusta: Often pre-mixed with spices like cardamom, sesame, and corn. Look for brands like “Oliang” powder or “Number One Brand” Thai coffee mix. These are specifically designed for this drink.
Dark Roast Robusta: Provides the classic bold, bitter, and woody notes. It has higher caffeine and more crema, which is great for that frothy top layer.
Dark Roast Arabica: If you prefer a smoother, less bitter coffee with more nuanced flavors (like chocolate or nutty notes), a dark roast arabica from Sumatra or Vietnam is an excellent choice.
Grind Size: Aim for a medium-coarse grind, similar to what you’d use for a French press. Too fine, and the brew will be muddy; too coarse, and it will be weak.

Common Mistakes And How To Avoid Them

Even small errors can throw off the balance of your Thai coffee. Here are pitfalls to watch for.

Using Regular Milk and Sugar: This will not replicate the creamy, distinct sweetness. Sweetened condensed milk is essential for its texture and caramelized flavor.
Brewing Weak Coffee: The coffee must be strong enough to balance the sweetness. Use enough grounds and brew slowly. If your coffee tastes flat, increase your coffee-to-water ratio.
Skipping the Stir: You must stir the hot coffee and condensed milk vigorously. This dissolving process creates the signature frothy layer and ensures the sweetness is evenly distributed.
Pouring Coffee Over Ice First: For iced coffee, always put the condensed milk in first, then the ice, then the hot coffee. The hot coffee helps melt and integrate the milk properly as it flows through the ice.

Customizing Your Thai Coffee

Once you master the basic recipe, you can adjust it to your personal taste. Feel free to experiment with these variations.

Adjusting Sweetness and Strength

Start with 1.5 tablespoons of condensed milk per cup. You can add more after tasting if you prefer it sweeter.
For a stronger coffee flavor, use more grounds during brewing or let it steep slightly longer. For a milder drink, add a splash of hot water after mixing.

Flavor Variations

Thai Tea Coffee: Add a teaspoon of Thai tea mix to the coffee grounds before brewing for a hybrid drink.
Chocolate Thai Coffee: Stir in a teaspoon of cocoa powder or chocolate syrup with the condensed milk.
Coconut Thai Coffee: Substitute a tablespoon of coconut milk for a portion of the condensed milk, or use coconut-flavored syrup.
Spiced Versions: Experiment with different spices like a cinnamon stick, a clove, or a slice of fresh ginger in the grounds.

Serving And Presentation Tips

Presentation is part of the experience. Serving it correctly enhances enjoyment.

Always use a clear glass or mug to showcase the beautiful color and layers, especially in the iced version.
For iced coffee, use large ice cubes. They melt slower and won’t dilute your drink as quickly.
Serve with a long spoon or a straw for stirring and sipping.
For a cafe-style finish, after stirring, gently pour a thin layer of evaporated milk over the back of a spoon to float on top of iced coffee.

Frequently Asked Questions

What is the difference between Thai coffee and Vietnamese coffee?

They are similar but have distinct differences. Both use a metal filter (phin) or cloth filter and sweetened condensed milk. However, Thai coffee often uses robusta beans that are sometimes mixed with grains and spices like cardamom or sesame. Vietnamese coffee typically uses a dark roast robusta or arabica/robusta blend without spices, resulting in a cleaner coffee flavor. The brewing devices are also slightly different in design.

Can I make Thai coffee with instant coffee?

Yes, you can make a quick version. Dissolve 2 teaspoons of instant coffee (or more for strength) in 2 tablespoons of hot water to create a concentrate. Pour this over condensed milk and ice. While it won’t have the same depth as a brewed version, it’s a fast alternative when your in a hurry.

How do I store leftover brewed Thai coffee concentrate?

You can brew a larger batch of the plain coffee concentrate (without milk) and store it. Let it cool, then keep it in an airtight container in the refrigerator for up to 5 days. When ready to serve, mix the desired amount with condensed milk and ice. This is a great time-saver for mornings.

Is Thai coffee very high in caffeine?

It can be, depending on the beans. Traditional robusta beans contain almost twice the caffeine as arabica beans. If you are sensitive to caffeine, consider using a dark roast arabica blend, or simply drink a smaller serving. The condensed milk does not effect the caffeine content.

What food pairs well with Thai coffee?

Thai coffee pairs wonderfully with both sweet and savory breakfast foods. Try it with buttery pastries like croissants, with tropical fruit, or with traditional Thai snacks like sticky rice with mango. Its sweet and strong profile also complements spicy dishes, as the sweetness can help balance heat.