Mary surprised me with this cake for my birthday in 2025. She found the recipe online and made it entirely herself. She struck gold—it's a very good vanilla cake! Since then, she has made it 2 or 3 additional times just for fun. The process is a bit more complicated than for your average American-style butter cake as it uses Japanese techniques to produce a plush and soft crumb. The layers are sturdy enough to be stacked and do not sink in the middle. In many ways, it's similar to an old-fashioned hot milk cake. The batter can also be used to make cupcakes.
NOTE: Once you start beating the eggs, you have to follow through with the entirety of the cake-making process and get the batter in the oven promptly. If you delay, leaving the batter to sit for an extended period, your cake will not rise as well.
2-1/2 tsp. baking powder
Preheat oven to 350-degrees with shelf placed in the center.
Whisk flour, baking powder, and salt in a large bowl; set aside. (You'll be using the bowl later on after dumping out the flour, so it needs to be large enough to accommodate more than just the dry ingredients that you're adding now).
Beat eggs for 30 seconds on Speed 6 of a stand mixer fitted with a whisk attachment.
With the mixer still going, pour the sugar in over 45 seconds.
Then beat for 7 minutes on Speed 8, or until tripled in volume and white.
Scatter about 1/3 of the flour across the surface of the whipped eggs in the stand mixer bowl, then beat on Speed 1 for 5 seconds.
Pour the hot-milk-and-butter-mixture, the vanilla, and the oil into the now empty flour bowl.
Pour batter evenly between both pans.
Bang each cake pan on the counter 3 times to knock out big bubbles. (Doing so will not deflate your batter, but rather will drive large air bubbles to the surface so you don't end up with holes in your finished cake crumb)
Bake 30 minutes or until golden and toothpick inserted into center comes out clean.
Remove from oven. Cool in cake pans for 15 minutes, then gently turn out onto cooling racks. If using as layer cakes, cool upside down so that the slight dome will flatten perfectly. Level cake = neat layers.