Galaxy Surprise Cake Recipe | Unplug and Unwind

October 02, 2025 Charlotte Kindley

Here is a fun and surprising galaxy cake recipe for you and the kids!

If you don’t have a cake pop machine, you can use sphere moulds. Click here for a method on how to make the planets without a cake pop machine

Mix the chocolate cake mix and add black gel food colouring, and put it to the side
Mix your vanilla cake mix and split it into as many coloured portions as you like
Create solid cake balls out of half the colourful cake mix. You can also make them with multiple colours by adding the cake mix in layers.
Create circles for the bottom of the cake tins and mark two of them to differentiate the TOP and BOTTOM of the cake.
Cut the cake balls in half, and in the two X-marked cake tins, place the cut side down onto the bottom of the pan, add some cake batter and add full cake balls on top.
Cover the cake balls in batter
In the other two cake tins, add cake batter to the bottom of the tin and randomly place the cake balls; bang the tins to release air bubbles.
Bake according to the chocolate cake instructions or until a toothpick comes out clean
Leave to cool

Separate egg whites and whisk together over a bain-marie (mixing bowl over simmering water), continue whisking for 3-5 minutes or until the sugar has dissolved.
Take off the heat and continue to whisk on a low setting until bubbles
Mix at a medium-high pace until the bowl is room temperature, to get stiff and glossy peaks
Add in room temperature butter and mix till there are no lumps

If making black food colouring for the filling, split the mixture and mix in until combined

Place a cake with an X on a cake board, unlevelled side down
Add some black buttercream as the filling, and repeat this step until the last X cake is on top with the non-levelled side face down.
Add a crumb coat to lock in crumbs and refrigerate for at least 15 minutes
Now decorate however you desire and enjoy!

For more information about the cake, click here