Japanese Jiggly Cheesecake (Soufflé Method and Water Bath)

Japanese jiggly cheesecake — known in Japan as soufflé cheesecake or cotton cheesecake — has been a staple of Japanese bakeries and patisseries since at least the 1990s, popularised by chains such as Uncle Tetsu's. Its viral moment came in the mid-2010s when videos showing dramatically jiggling cheesecakes fresh from the oven spread across social media, and the format gained further momentum as Japanese bakery chains expanded internationally. The technique combines elements of a classic cheesecake with a Japanese-style meringue cake: the base is a cream cheese, butter, milk, egg yolk, and flour mixture into which separately whipped egg whites are folded. The egg whites must be whipped to medium-stiff peaks — not stiff — because over-whipped whites create a dry, crumbly texture rather than the characteristic cottony softness. The folding must be done in three additions, very gently, to preserve maximum aeration. The water bath is non-negotiable. The cake is baked inside a larger pan filled with hot water to 2–3cm depth. This creates a humid oven environment that prevents the surface from cracking and allows the delicate soufflé-like structure to set evenly without overcooking the exterior. The baking temperature is deliberately low — 160°C — and the total baking time is long, often 60–70 minutes, followed by 30 minutes in the oven with the door slightly ajar to prevent collapse from thermal shock. The signature jiggle results from a custard-like set that is softer than a conventional cheesecake. The cake is done when the surface is golden and the centre moves as one cohesive mass when the pan is gently shaken — not as a liquid but as a set gel. Overbaking produces a dry, springy texture that loses the cottony quality entirely.