Cake pops, rainbow cakes and piñata cakes are all former trends of cakes including the anti-gravity cakes. A newest trend of cake will surely surprise consumers.

Hidden centre cakes looks so ordinary from the external appearance but cut inside, super delightful designs will shock cake lovers.

It is a new hot trend, and it's time to try it! These new cakes are available at Marks & Spencer's.

'Our Penguin Party Madeira Cake is definitely one of our most complex cakes ever,' said Helen Brennan, Marks & Spencer's Product Developer for Cake.

'It takes 52 people to assemble each cake, as each one has 27 different components, from our signature all-butter Madeira sponge and buttercream filling to handmade snowballs and penguin eyes,' Helen added.

At first, the cake will look like an igloo with some penguins, but after cutting it in any angle, it will surely reveal a cute penguin face inside it.

'We did lots of travel trials to ensure it doesn't arrive at people's homes with penguin heads skating all over the ice, and it's now perfect.

'There's a real trend for pushing baking boundaries, which is something we always try to do at Marks & Spencer. This one was a real challenge - and cutting open early attempts in front of roomfuls of people always left me holding my breath! But now the cake it works perfectly every time.'

Helen also gave an advice for home bakers who attempt to make some hidden centre cakes to practice and be prepared for several trial and errors until coming up to the best design.

There are several designs a hidden centre cake may have such as shapes, names, animal faces, numbers and words. It can also hide big questions like "marry me?" for a proposal event. Names of the recipient can be also hidden inside a cake to be given as a gift.