Once you have layered each sponge you need to do a crumb coat by using as little buttercream as possible around the edges to seal in the spare crumbs from the sponges! I then chill the cake for a while to firm it up before adding another layer of buttercream on top. Once my sponges are baked, I leave them to cool completely and freeze them wrapped in clingfilm over night so that they are easier to decorate the next day – but this bit is completely optional of course!!

I then pipe on the leftover buttercream and add on some more rainbow sprinkles and the best cake ever is finished! I am in love with the sponges and how bright and pretty it is – but the key point to make, YOU NEED TO USE GOOD QUALITY COLOURS. To bake a rainbow cake, you can use colorful frosting or color the cake’s batter with food coloring. You can also use edible markers to draw the colors on the cake and make your patterns. Rainbow cake ideas for your birthday party. Every birthday deserves a rainbow cake, and this one is no exception! Whether you’re looking for a unique way to celebrate or want to make your next event memorable, these cakes are sure to wow. I love all things cake, we all know this, but a rainbow cake is something else. The absolutely insanely bright colours, the sweet taste, and all things cute take it to a different level entirely! It is just glorious.

Hi, I'm Julie!

Oh hellooo most requested recipe OF ALL TIME. I am not even joking, this recipe has been requested over and over again and I am ~finally~ posting it on to my blog! It’s taken a fair old time as I wanted to get it right! The oven temperature is a bit lower than normal, as I don’t want the sponges to brown too much. This also comes somewhat from the brands of colours that you use! Red food colouring, orange food colouring, yellow food colouring, green food colouring, blue food colouring and purple food colouring. for the sponge mixtures! For the buttercream, you do use 750g unsalted butter and 1500g icing sugar, which technically is a little obscene but the amount of servings from this cake is huge so please don’t be a negative Nelly about the sugar content! A rainbow cake is a type of multi-layered cake that uses several colors of frosting, each representing one of the colors in the visible spectrum. TMNT Birthday Cake

When it comes to baking a rainbow cake, there are many ways you can go about it. You can use colorful frosting or color the batter with food coloring. You can also use edible markers to draw the colors on the cake and make your patterns. I make my buttercream like normal by beating room temperature unsalted butter on its own for several minutes to make it really loose and supple, and then I gradually add in the icing sugar! I make sure to beat this for quite a long time. Just as I have finished the buttercream I carefully press in some rainbow sprinkles to the bottom of the cake for a bit of colour and I just love the design – be warned, sprinkles will fall off at this point so beware! After this, I chill the cake again!Then, you mix it all together like normal, and then split into three bowls. It doesn’t matter which colours you do first, but I did red, orange, and yellowtogether, and then green, blue and purple. A rainbow cake is perfect for any occasion: birthdays, graduations, baby showers, weddings, and more.

For this cake, I did make probably the biggest one tier cake ever. It’s about 8-9” in height, and uses so many ingredients. Because it is a six layer cake I decided to make it in two batches. So three layers at a time, so therefore you still only need three tins! The cake ideas can be a bit difficult to come up with, especially when it comes to birthday cakes. However, this article will provide you with some creative and fun ideas for your next birthday cake.So… I will say from the beginning that this recipe uses lots and lots of ingredients, and it is a humongous cake! Like, its 6 layers of cake, and all the buttercream in-between the layers, and all the decor on top! Rainbow cakes are so much fun! They’re colorful, and beautiful and can be made in a variety of different colors. They’re easy to make and can be decorated in many different ways. Plus, they’re a great way to celebrate birthdays or other special occasions like graduation. I use a large metal scraper to decorate the sides of the cake, and a small angled spatula to also help cover the sponges – and its much easier and you are going to get a smoother finish using these as well!