Using a tea steeper, combine 2 tbsp Thai tea mix with ½ cup hot water.
Let it steep for about 10 minutes, then remove the tea leaves.
In a cup or foam maker, combine 2 tbsp Thai tea, ¼ cup heavy cream, and 2 tsp condensed milk.
Froth using the cold foam setting on a foam maker, or whisk vigorously until light and airy. Set aside.
Sift 4 g matcha into a bowl.
Add hot water (~175°F / 80°C) and whisk until smooth and frothy.
Fill a glass with ice.
Pour in milk.
Pour in the prepared matcha.
Top with the Thai tea cold foam.