Put all the ingredients of the [filling] into a pot.

Stir evenly over medium heat until it is slightly thick, then turn off the heat.

After letting cool, then put it in a piping bag for later use.

Add butter and water to the pot and boil until emulsified.

Turn to low heat and slowly pour in the sifted all-purpose flour, stirring while pouring.

Turn off the heat when it is almost stirred, and continue to stir at the remaining temperature until there is no dry flour, then let it cool.

Beat in the eggs after letting cool. Each egg must be stirred well before adding another one.

Stir until smooth and put the dough it into a piping bag.

Put a baking paper on the baking tray and squeeze out 12 puffs.

Spread a little water and flatten the tip of each puff.

After the oven is preheated to 160°C, put it in and bake for 40 minutes. After baking, let it stay in the oven, take it out after 5 minutes.

Cut the puff or punch a small hole at the bottom to put the filling in.

Sprinkle some icing sugar and it's done! It will taste like ice cream on the next day, if you put into the refrigerator!