In a saucepan, bring 4 cups of water to a boil
Add the Cha Tra Mue Thai Tea Mix to the boiling water. Reduce the heat to low and let it simmer for about 3-5 minutes. Stir occasionally to ensure the tea is properly infused
After simmering, remove the saucepan from heat and let the tea steep for another 5 minutes. This allows the flavors to develop further
Place a fine-mesh sieve or a cheesecloth over a pitcher or a large bowl. Pour the brewed tea through the sieve to strain out the tea leaves and any particles
Add condensed milk to the strained tea. Start with 4 tablespoons and adjust the amount according to your preference for sweetness
Stir in the granulated sugar. Again, start with 4 tablespoons and adjust to suit your taste. If you prefer a sweeter tea, add more sugar and stir until it dissolves completely
Allow the Thai tea mixture to cool to room temperature. You can refrigerate it to speed up the cooling process
Once the Thai tea mixture has cooled, fill serving glasses with ice cubes
Pour the Thai tea over the ice cubes, leaving some room at the top of the glass for additional milk if desired
Optional: If you prefer a creamier version, top each glass with a splash of evaporated milk or regular milk
Stir the Thai iced tea gently to incorporate the milk into the tea and create a beautiful gradient effect
Taste the Thai iced tea and adjust the sweetness or creaminess by adding more condensed milk, sugar, or milk as desired
Serve the Cha Thai Yen chilled and enjoy!