Oliang (โอเลี้ยง)

The Coffee That Roasts With Corn

โอเลี้ยง is Thai iced black coffee, and the Kapook source defines it exactly: "black coffee with sugar, served cold" — with one essential difference from everything you've ever called black coffee. The powder is ผงกาแฟโบราณ, traditional coffee: beans roasted with grains — corn and tamarind seeds — then ground together. That blend is the drink's deep, slightly smoky, slightly nutty character, and it's why oliang can't be made properly from a supermarket espresso grind.

The brew is the other half of the ritual. Aroifin's method is the stall standard: the powder goes in a cloth sock, boiling water is poured through, and then — the signature move — the coffee is poured back and forth between two glasses through the sock five or six times until it runs dark and clear. No machine, no filter paper, just gravity and repetition. Sugar is stirred in hot, then the lot goes over a full glass of ice.

The Wongnai guide maps the family, because the cart sells several drinks from the same pot: โอยัวะ is the pure black, no sugar; โอเลี้ยง adds the sugar; โอเลี้ยงยกล้อ floats fresh milk on top; โกปี๊ swaps in condensed milk. Ordering the right one is a fluency test — and the calories go up with every addition.

The Recipe (one glass — the Aroifin stall version)

Kapook's bigger brew: 6–8 tbsp powder to 2 cups water, with two knotted pandan leaves in the brew for the aromatic version — sugar to your own taste.

The Method

1. Sock it. Powder in the cloth sock over a glass; boiling water poured through.
2. Five or six rounds. Pour the coffee back and forth between two glasses through the sock until it runs dark and clear — Aroifin's count.
3. Sweeten hot, ice cold. Sugar stirred in until dissolved, then over a full glass of ice. Serve.

Where Thai Sources Disagree

How Western Versions Get It Wrong

• Espresso over ice. Oliang's taste comes from the grain-roasted traditional powder. Espresso is a different drink wearing the same ice.
• Calling it Thai iced coffee. Thai iced coffee (กาแฟเย็น) is sweetened condensed milk over the same brew. Oliang is black with sugar — no milk at all.
• Paper-filter brews. The sock-and-pour is the method. A paper cone leaves the body behind.
• Instant coffee. Instant dissolves; the sock brew steeps. The texture and the crema-like top are the point.
• Skimping the ice. The glass should be full — the drink is meant to dilute slowly as you work through it.

UK Ingredient Notes

• Traditional coffee powder (ผงกาแฟโบราณ): Thai grocers sell the roasted-with-grain blends — look for "oliang powder" or brands like Aroma/Nescafé's Thai line.
• Cloth coffee sock: Thai grocers or online; a large fillable tea bag works in a pinch.
• Pandan leaves: frozen at Thai grocers, for the aromatic version.
• Serve with toasted bread, Chinese doughnuts (ปาท่องโก๋) or fried rice — the cart pairings.

Sources

This recipe is translated from the following Thai-language sources. Where they disagree, we've said so.