Crack 2 eggs into a bowl and whisk them manually until smooth.

Add 200g milk to the whisked eggs and mix well.

Melt 20g butter in the microwave and mix it into the egg-milk mixture.

Sift 100g all-purpose flour and prepare it for mixing.

Add the sifted flour into the egg-milk-butter mixture.

Preheat the oven and muffin tin together at 200°C.

Pour the batter into the preheated muffin tin and bake at 200°C for 20–30 minutes.

Observe the batter puffing up; it should be hollow inside but crispy outside.