Taiwanese Castella that You Can Bake at Home! (with severe noise...) お家でできる 台湾カステラ（ノイズあり）

Taiwanese castella is a light and fluffy sponge cake. Hearing that it could be baked at home, we gave it a try. Simple and with a full eggy flavor, castella has a very satisfying taste. Easy to slice and light and fluffy even when chilled, it also makes a great gift! (When I tried to edit, I noticed a terrible noise...) * Recipe * (18 cm square pan) 1. Divide 6 eggs into yolks and whites. 2. Heat 60 g salad oil in a 600-watt microwave oven for 40 seconds, then pour into a bowl. 3. Sift 95 g cake flour into