If you're still feeling a bit hungover and headachey from New Year's celebrations, you might want to wait a while before watching this.

Some wily baker in the US has made a total mind-bender of a cake – one that changes colour completely as it is turned around.

It starts off as yellow, orange and pink, as seen above, but when spun around on its plate it becomes purple blue and yellow.

WHAAAT.

You can watch the video in full here, shared by YouTube baker Charlotte Sometimes.

While Charlotte has yet to offer any explanation as to how the head-melting cake came out, some commenters have stepped in to spoil the illusion. It seems the cake has simply been sprayed with different colours of dye from opposite angles.

"Make the edging design you want, then take one side of the cake and spray from a straight angle on the cake, so that the colour ends up on one side of the ridges alone," wrote one commenter.

"Spray the colours you want, then spin the cake around and do the same on the opposite side. You are working with the ridges so that you get one colour on one side of the ridge and another on the other side."

However another commenter added that the edible spray paint used can sometimes "smell terrible"… so maybe it's best to stick with that Chocolate Swiss Roll for now.