In a large mixing bowl, combine all the dry ingredients: flour, baking powder, sugar and mix well.
Then pour the melted butter, milk and water. Mix but do not make it bubble. Then stir until all the lumps disappear and the batter is smooth in consistency.
Grease the puto molds with margarine or butter.
Then pour some puto batter in the mould, just half of the height of the mold.
Scoop 1 tablespoon of pork asado filling then pour again some batter until the puto mold is filled just enough to cover the filling.
You can top your puto with thin slice of salted egg and cheese sticks if you want.
Arrange in a steamer and steam for about 10 to 15 minutes. The time needed depends on the size of your puto.
You can also insert a toothpick in the middle while steaming the puto to check if it is already cooked.
If the toothpick comes out clean, then your puto is already done.
Remove from the steamer and let it cool for a while then remove from the molds.
Arrange in a platter then serve. Eat and enjoy!