Take a walk through Uncle Tetsu's and see how they make their famous fluffy cheesecakes so light

From Australian dairy to meringue whipping and "whole-arm" hand mixing – we get a tour of what makes those cheesecakes so damn fluffy.

From the second you see the queue outside the newly-opened Uncle Tetsu's at Regent Place in Sydney's CBD you know there's something special going on. Not only are people happy to queue for up to 45 minutes, but they start lining up before the store opens at 11am. The fuss? Well, it's over the fluffiest Japanese cheesecake you're likely to come across, courtesy of the popular chain by Mizokami Tatsushi (aka Uncle Tetsu), as featured in the clip above.

With hundreds of stores now dotted across China, Taipei and Canada collectively, it was only fitting that the Tetsu cakes should finally come to Australia, after all, Tetsu has been using Australian dairy–and specifically our cream cheese–since he fell in love with it as a student several decades ago.

Officially launched in the '80s, the signature cheesecake uses a meringue technique to make the cakes unbelievably light and fluffy.

9Kitchen was lucky enough to get a walk-through of the cake making process, from egg white whipping to hot poker logo branding of the finished cakes, and you can see the whole process in the video above.

Butter, milk and that Aussie cream cheese are melted together, before sugar, flour and well-whipped egg whites are added to the mix. The secret to the perfect texture, however, is in the hand mixing (or more accurately whole-arm mixing) of the meringue into the dairy mix. Bakers use their whole arm to gently fold in the fluff, keeping as much air in the mix as possible. It's then loaded into lined cake tins for perfectly-timed, steam-assisted baking that turns out a barely-golden, light as air, surprisingly eggy, and not as sweet as you'd expect cake.

The smell alone is enough to drive you wild, which is what keeps people joining that queue. Currently, they're turning out over 1000 cakes a day with clockwork precision, and getting faster all the time. It's a fascinating operation to watch – and in Tetsu's biggest kitchen yet the whole process is on display, with fans busily snapping their Tetsu hauls for Facebook and Instagram. Watch out for the one-cake policy, and the distinctive bags of cake that can be seen spreading out on George Street in all directions. The hype is real, and consistency of these cakes is quite remarkable.

As the clip above reveals, this really is cheesecake like you've never seen it before. Breathe it in and feel the anticipation build.