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1
Coffee liquid: Mix the ingredients and once dissolved, transfer the liquid into a bowl and set aside.
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2
Sift the cake flour.
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3
Preheat the oven to 170C.
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4
Separate the eggs into yolks and whites.
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5
Beat the egg whites while gradually adding in half of the sugar, and once formed into a firm meringue, chill in the fridge.
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6
Add the rest of the sugar into the bowl containing the egg yolks, and whisk until white and thick.
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7
Add milk and vegetable oil.
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8
Sift the flour you sifted in step 1 again into the bowl with the yolks, and mix well so that there are no lumps.
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9
Fold in 1/3 of the meringue from step 2 to the yolk-flour mixture from step 4.
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10
Add another 1/3 of the meringue and mix together.
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11
Transfer the batter to the bowl that held the meringue, and mix the batter using a cut-and-fold motion, to leave as much of the air in the meringue as possible.
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12
Put 2 ladles full of the batter from step 6 to the bowl with the coffee liquid from step 1, and mix lightly.
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13
Pour in the mixture from step 7 into the batter from step 6, and mix as if scooping up the batter from the bottom while spinning the bowl, about 3 times.
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14
Pour the batter into the chiffon cake mold.
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15
While holding the middle of the mold, gently tap the mold against the kitchen counter twice to remove any large air bubbles.
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16
Set the baking time for 30 minutes.
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17
First, bake for about 20 minutes at 170C.
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18
Make 4 to 5 cuts in the surface with a serrated bread knife.
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19
Reduce the temperature to 160C and bake for 10 minutes (or you can just keep baking at 170C).
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20
If a skewer inserted into the cake comes out clean, it's done.
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21
Remove the cake from the oven and invert it on top of a mug or cup, and wait until it is cooled fully.
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22
If you try to take it out of the mold while it's still hot, it will fall apart.
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23
When the cake has cooled down, cut around it with a cake knife to separate it from the mold.
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24
Separate the cake from the center part with a bamboo skewer.
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25
Invert onto a plate to unmold, and it's done.
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26
It'll look like this when cut.
