Japan — bakery tradition from 1990s; popularised internationally by Uncle Tetsu's chain; viral via social media 2015–2018
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.
Mild cream cheese sweetness, airy cottony texture, light vanilla, barely-set custard quality
Whip egg whites to medium-stiff peaks only — over-whipped whites produce a crumbly texture Fold whites into the batter in three gentle additions to preserve the soufflé-like aeration Bake in a water bath at 160°C — the humid environment is essential for even setting and crack prevention After baking, rest in the oven with the door ajar for 30 minutes to prevent collapse from thermal shock The jiggle test — the cake should move as one cohesive set gel, not as liquid
Run a small palette knife around the inside of the pan before removing to release it cleanly without tearing For the most pronounced jiggle, reduce the flour slightly — even 1–2g less per portion softens the set A lemon zest addition to the cream cheese base brightens the otherwise mild flavour profile Use a cake tin lined with parchment on the base and sides, greased — the cake needs to release fully For presentation, dust with icing sugar just before serving and never refrigerate before the first service — cold kills the jiggle
Whipping egg whites to stiff peaks, which creates a dry crumbly texture after baking Skipping the water bath — the surface cracks and the texture becomes rubbery and uneven Removing from the oven directly after baking — thermal shock causes the soufflé structure to collapse Under-folding the whites so streaks of unincorporated egg white remain in the batter Baking at too high a temperature — the exterior overcooks before the centre has set