Saturday, July 18, 2009

Rainbow Cake

Since I posted pictures of this on facebook I've been getting so many requests for the recipe. First off, I'd like to give all the credit of the recipe to where I found it It's one of my favorite sites and actually gave me the inspiration to start my own blog. Thanks Omnomicon!!

This cake is perfect for holiday celebrations, birthday.. you name it, it's perfect for the occasion!

So, are you ready to make an awesomely fun cake?


Two boxes of white cake mix
Two cans of sprite zero
For baking: follow the oven directions on the box

Can you believe it... that's all you need for this cake! Place the cake mix in a bowl and add the sprite. Mix it together.
Split the cake batter into as many colors you will be using for the cake. FYI- I made this cake as a Fourth of July cake so we only used three colors. Feel free to use as many colors as you would like. I also recommend using Betty Crocker Classic Gel Food Coloring. It will give you the brightest colors for you cake guaranteed!

You want to put an even amount of colors in two round pans. You're going to have to do the math on this. If you are using six colors then you are going to use about 2/3 cups per color in a round baking pan.

You are going to layer these colors as shown below. Don't spread it out the cake mix, just pour one color on top of the other.

Here's what the batter should look like right before it goes into the oven. It sort of looks like a bulls-eye.
Follow the directions on the back of you cake mix box for oven temperature and baking time.

When your cake is done, have it rest on a wire cooling rack. Let's the cakes cool all of the way before frosting. If you are in a hurry to cool them, put them in the freezer. Don't leave them in there for two long... maybe just 10 minutes.

K made a buttercream frosting for the cake using a recipe from our Betty Crocker Cookbook.

Vanilla Buttercream Frosting Recipe:

3 cups powdered sugar
1/2 cup butter
1 1/2 teaspoon vanilla
1 to 2 teaspoons milk

Mix powdered sugar and butter into a soft cream. Add the vanilla and 1 tablespoon of milk. Gradually mix in the remaining milk to make the frosting spreadable.

Start with layering the cake with frosting. You're really going to need to eyeball this part. Gradually add frosting until it cover the top of the bottom layer of the cake. (That sounded confusing but you get the picture right?)

Add the top layer of cake the bottom layer.

Use the remaining amount of frosting to cover the entire cake.

Since we were celebrating Independence Day I added a star to the top of the cake. I created this by using a cookie cutter and sprinkles.

Here's the end result. Doesn't is look great?!
Here's the finaly product if you use multiple colors. Thank you again for the great recipe and delicious cake!!
Picture taken from

An upcoming blog for this particular recipe will be for rainbow cupcakes. Stay tuned!


jake and kim..... said...

That cake looks more like a Homestarrunner cake....Even better. I can tell you it makes my mouth water.


Bekah & Kyle said...

"And somebody's a-ga-wabbin' a-my butt."- Homestar Runner... lol!


Sunshine said...

Awesome! What a fun recipe to have in your back pocket. Thanks for the post!

Sunni said...

i was there when you made this cake! yay