melt the butter in the microwave or on a double boiler
Combine eggs and sugar, mix
Add in melted butter and milk
Sift glutinous rice flour.
Add the shifted glutinous rice flour in 3 increments and mix in between.
Run the batter through a sieve to get a smoother batter
Then pour into the mold. Put into the preheated oven and bake for 30 minutes
Once it's done, it should be golden brown on the outside. Set it on a cooling rack to cool for about 10 minutes. Enjoy it as it is or with some coffee or milk!
Notes
If baking in a muffin or cupcake mold, turn the temperature to 400 and bake for 25 minutes, can flip the cake and bake another 10 minutes for it to crisp up.