Rainbow Birthday Cake

You might think making a rainbow birthday cake is hard and you would be wrong. It's actually really easy to put a rainbow cake together, there are step by step photos to help you make your first rainbow cake!

This post is sponsored by Betty Crocker.

Birthdays are a time for celebrating…you, your family members and your friends! But why is it a cause for stress sometimes? It shouldn't be. I still remember my birthday parties as a kid, vividly. I remember the taste of the cakes I had (yum!), the games we played and how I felt. That's the most important part, I felt special and it was my day.

Everything including the cake doesn't have to be perfect. You can make the cake and do it yourself…yes, you can and it doesn't have to be perfect (I'm repeating myself I know but it needs to be repeated). Because you're celebrating someone and their birthday, that's the most important part to remember. Because how you make them feel will be the most memorable thing about their birthday, not how perfect the tablecloth was or how perfect anything was. Believe me, as I'm typing this, I have to remind myself constantly. A perfectionist at heart, it's hard to let go of perfection. But I know I need to because that stress and that worry to make it all perfect comes at a cost.

I have always wanted to make a rainbow cake. I have always wanted to do it…like seriously it has been on my baking bucket list. So when, I had this opportunity to work with Betty Crocker (so exciting since I'm such a huge fan of the brand!), I wanted to try my hand at this rainbow cake.

It was so much fun and hopefully with my straightforward photos and steps, you can do it too! It will be perfect for your next birthday celebration. You can do it…if I can…you can too! 🙂

A trick I learned a long time ago, trace with a pen along the edge of the cake pan over wax paper or parchment paper. And then cut it out.

This will keep the cake from sticking to the bottom of your pans!

I mixed one Betty Crocker SuperMoist White Cake Mix at a time. Since I did happen to have 3 cake pans that are the same size (I used to be a hobby cake decorator a long time ago). It's perfect because one box of cake mix makes 3 thin layers perfectly!

Mix up the colors and don't do as I do, mix the purple, blue and green first, it will make your life easier!

And bake them!

Allow the cakes to cool completely before handling them (on a cooling rack). Cut the tops of the cakes off to level them off. This is totally optional though. And remember this, the top of the cake is now the bottom of the cake. Remember that.

On a plate or cake stand, add a little bit of frosting (this will be like a clue for the cake). I used Betty Crocked Whipped Whipped Cream Frosting, it was so good!

Add the first layer (purple), remember the top of the cake is now the bottom. Why do we put the bottom of the cake on top? Because it's flat and has no exposed crumbs, it will be easier to add the frosting and it will be level! Press the cake down and then start adding frosting.

I added about 1/4 to 1/3 of the can of frosting to each layer. Use an offset spatula to smooth out the frosting between the layers.

Yay, the next layer!

At this point, I was feeling so accomplished. Ignore the mess behind the cake…this is what happens when you're making a birthday cake…and it's okay!

Almost done!

So exciting!

I added frosting to the top of the cake and smoothed it all out.

Now it's time to even out the sides with the frosting. Using any excess frosting that's sticking out between the layers, smooth it all out. This is the crumb coat, it's okay if there are crumbs showing.

Add more frosting to the sides and use your spatula to spread it evenly.

Done! I felt so accomplished and excited! I put the cake in the refrigerator overnight. Since it's a whipped cream frosting, I wanted to make sure it was completely stable before cutting into it.

The next day I added nonpareils to it. So bright and pretty!

And I held my breath when I cut into it…

And literally squealed with excitement! I couldn't believe I did it…I was so excited and seriously, the gorgeous colors, it made me smile the entire day!

Now I'm more excited to try different color combinations and I'm definitely making this cake for my sister next February for her birthday. Love love love!

Be sure to stay tuned, I'm going to share more birthday ideas soon and be sure to follow Betty Crocker on instagram for more ideas!

Pin it for Later

Disclosure: I'm thrilled to be working with Betty Crocker to #GetYourBettyOn! I only work with brands that I love and only share with you my honest opinions. This is a sponsored conversation written by me on behalf of Betty Crocker. The opinions and text are all mine.