Place a steamer rack and a bamboo steamer inside a wok (or whatever type of steamer you have). Add water to reach the bottom layer of the steamer.
Bring to a boil.
While we wait for the water to boil, prepare the mushi pan batter.
To make the Matcha Mushi Pan, combine flour, matcha and baking powder in a bowl with a pinch of salt.
In a small bowl, whisk the egg, milk and oil.
Add to dry ingredients and mix to combine.
To make the Black Sesame Mushi Pan, combine flour, sesame seeds and baking powder in a bowl with a pinch of salt.
In a small bowl, whisk the egg, milk and oil.
Add to dry ingredients and mix to combine.
Divide into 4 silicone muffin molds. Place in steamer and cook for 10-12 minutes until set and firm.