STEP 1/6
Beat the yolk in a bowl, add sugar A, and whip until ivory. Add water and mix it well.
STEP 2/6
Whisk the whites slightly, then make a meringue with a curved tip, dividing the sugar B into three. The top of the castella may crack if over whipped, so please make a meringue with moderate softness.
STEP 3/6
Add about 1/3 of the finished meringue to the yolk mixture and lightly mix. Add sifted flour and baking powder and mix well. When roughly mixed, add the rest of the meringue in two, and mix well with a big motion to increase the volume.
STEP 4/6
Add a little bit of batter to the rum, milk and vanilla extract and mix well, then add to the main dough and mix well to increase the volume.
STEP 5/6
Panning in a parchment pan, bake in an oven preheated to 170 degrees for 20-25 minutes. If the top is firm and you poke it with a skewer and it's clean, it's all cooked As soon as you get out of the oven, drop the gas on the floor and turn it upside down on the Teflon sheet to cool completely.
STEP 6/6
Whip the whipped cream tightly with sugar and coentro, place it in a piping bag, make some holes in the finished castella and squeeze the whipped cream into it. I squeezed it from the top, but I also made a hole on the side. Fill in the hole in moderation.I'll decorate it with my favorite raspberries and blueberries Sprinkle sugar powder, too Finished!
The meringue is not too much and you have to make a meringue that bends smoothly at the end to make a castella that does not burst on the top. You have to cook it thoroughly before you cook it in the oven to make a castella that doesn't turn off