Boil water and dissolve sugar

• Pour 12 cups (about 2.8 L) of water into a large pot.
• Add 2 cups of sugar.
• Bring the water to a boil, stirring so the sugar dissolves.

Add the Thai tea leaves

• Once the water is boiling and the sugar is dissolved, add 3 cups of Thai tea leaves (you can use tea bags or pour the loose leaves straight in).
• Stir everything together.
• Turn off the stove.

Steep the tea

• Cover the pot with a lid.
• Let the tea steep in the hot water for 30 minutes to 1 hour.

Strain the tea

• Set a strainer over a large metal bowl.
• Pour the steeped tea through the strainer to remove the leaves.
• Discard the leftover tea leaves in a plastic bag; press them with a spoon to squeeze out any excess tea.

Store and serve

• Pour the strained tea into a large Mason jar.
• Refrigerate and serve whenever you want, adding condensed milk (or evaporated milk) to taste.