This year we celebrated our daughter’s first birthday. I love birthdays, parties and decorating! And you know what, I love to do it even more when it’s for my sweet little miss! Her party was rainbow unicorn themed. So, what else is this mom to do, but whip up a 6 layer rainbow unicorn cake?! Well, that is just what I did! Read on to learn how to easily make a rainbow cake for any occasion.
Start by whipping up a double batch of your favorite vanilla cake batter. I used a family recipe. Use your favorite go to white cake recipe, or even a box mix. If you use a box mix, you will need two. I actually made my batter in batches as well. I made one batch, the equivalent to one box mix, and split that into three separate bowls.
Then I colored each of the bowls an individual color. The first batch I did pink, orange, and yellow. You do not want to over mix your batter or you risk your cake becoming slightly tough. I stir the food coloring in just until I reach color uniformity, or very close to it. I use Wilton’s Color Right Performance System.
Next, grease three cake pans and add the batter. I used this cake layer pan set from Wilton. It worked fabulous! Bake according to your recipe’s directions, but check your cake a couple minutes earlier than normal. These layers are slightly thinner than a typical cake layer.
Once the cake is baked, remove it from the oven and allow to cool in the pans for about 10 minutes. After this time, flip the cakes out of the pan onto wax or parchment paper.
During the time the first batch is baking, I whip up and color the second batch of batter. This time it was green, blue, and purple.
Sometimes cake layers will slightly dome at the top during baking. So,after all the layers are baked and cooled, use a bread knife to flatten each of the layers so they will lay even when you put them together, if needed. Now, take your favorite cake filling, or frosting recipe and stick each layer together. One of my favorite filling combinations is to use red raspberry jam and buttercream frosting. Put a thin layer of jam on one side of the cake and on the other layer a thin layer of buttercream. Now sandwich the two sides with filling together. Repeat this for each layer until you reach the top. If you are looking for a great buttercream recipe I highly recommend this Marshmallow Buttercream Frosting by Amanda Cupcake . It is simply delicious!
Once you have assembled your layer cake than you can decorate it. Always remember to do a crumb coat prior to frosting your cake, even if you are going to use fondant.
A fun alternative would be to make an ombre layer cake. Shades of pink or shades of blue for the layers would make an awesome gender reveal cake! Green ombre would be awesome for St. Patrick’s day, frosted up like a pot of gold. The possibility with colored layers is endless!
I finished off my cake by frosting the whole thing with that delicious marshmallow buttercream. Then decorated it up as a unicorn. I made the horn out of fondant and added a beautiful floral mane. For the full tutorial on how to decorate the cake like a unicorn check out this post.
And here is a peek at what it looks like when you cut into the rainbow layer cake.
And here is the cake all decked out like a unicorn! Isn’t it magical! I would love to see your rainbow layer cake if you bake one up!