Summary of "The most expensive cake."

The most expensive cake

Video title: “The most expensive cake.” Presenter/channel: not specified in the subtitles.

No substitutions were mentioned.

Very large container for cracking 500 eggs
Team to separate yolks and whites by hand (manual separation emphasized)
Industrial mixer for whipping egg whites
“Special oven” for baking (type/temperature not specified)
Preparation is highly controlled: produced only 69 times per year; recipe is kept secret and production is tightly restricted

Crack 500 eggs into a very large container.
Separate yolks from whites by hand with extreme precision.
Place the egg whites in an industrial mixer with salt, sugar, and baking powder; beat until a light, airy foam is obtained.
Separately mix the yolks with flour and milk until smooth and homogeneous.
Very gently fold the whipped egg-white foam into the yolk/flour/milk mixture.
Bake the combined batter in the special oven for 20 minutes.
Result: an extremely soft, elastic Castella cake that “melts in your mouth.”

Separation: done by hand and described as requiring “extreme precision.”
Whipping: beat whites with salt, sugar, and baking powder until a “light and airy foam” (no further visual cues provided).
Folding: fold the two preparations very gently to preserve the airy texture.
Baking time: 20 minutes in the special oven (no temperature given).

Precision when separating yolks and whites is emphasized.
Gentle folding of whipped whites into the yolk mixture is crucial for the cake’s signature soft, elastic texture.
The recipe and production are secret/restricted; the cake is made infrequently (69 times per year) and offered to a limited group.

The cake is identified as Castella.
It is claimed to sell for very high prices (“sold for millions of dollars”) and is offered only to a restricted group.
Subtitles note that some people have managed to uncover the method despite the secrecy.