Rainbow Cake Recipe | All Things Mamma (2024)

This rainbow cake is a show-stopping crowd-pleaser. Not only does it look out of this world, but it tastes amazing, too. It will be hard to resist a second slice!

Rainbow cake is one of those cakes that is great for pretty much all occasions. It’s fun, exciting, and pretty delicious. The cake couldn’t be easier to make too. The colorful layers are made from a doctored boxed cake mix that gets their colorful additions from food coloring. In between the orange, yellow, green, and blue layers is super fluffy buttercream frosting. Each bite of this cake is truly better than the last.

SIMPLE RAINBOW CAKE RECIPE

The rainbow cake recipe takes a classic boxed cake mix and doctors it up a little to make it even better. The recipe takes the boxed cake mix and adds sour cream, vegetable oil, eggs, and water to make a super fluffy and moist cake.

To get all of the colorful layers in this cake, you’ll need to have six cake pans. After you mix the cake, divide the batter evenly among six bowls and add an equal amount of food coloring to each bowl. You can use any kind of food coloring, but gel food coloring will provide the strongest color in the cake. With the cake batter ready to go, add it to the six cake pan and place it in the oven to bake. While the cake is baking, make the frosting so it will be ready to go once the cake is cooled completely.

INGREDIENTS

• White cake mix – the white cake will hold the food coloring the best.
• Vegetable oil
• Sour cream – keeps the cake nice and moist.
• Eggs
• Gel food coloring
• Buttercream frosting

HOW TO MAKE A RAINBOW CAKE

1. MAKE THE CAKE BATTER

Add the boxed cake mix to a bowl and combine with the remaining ingredients. Stir together well using a whisk or electric mixer.

2. ADD THE FOOD COLORING

Distribute the cake batter evenly among six bowls and add an equal amount of food coloring to each. Each color will be a different layer of the cake. When the color is evenly distributed, add the batter to six or eight-inch round cake pans.

3. BAKE THE CAKES

Bake the cakes in the oven until a toothpick comes out clean. Take out of the oven and let the cakes cool completely.

4. MAKE THE FROSTING

While the cakes are cooling, make the buttercream frosting.

5. FROST THE CAKE

When the rainbow cake is cool, start frosting the cake. Add a dab of frosting to the bottom layer to secure the cake. Then add frosting to one layer at a time, starting with the frosting in the middle and spreading it out to the edges. Add the layers as you go. Once all of the layers are added, use the frosting to add a small crumb coat to the cake and let sit in the refrigerator to chill. After about 30 minutes, add the remaining frosting. Add sprinkles and decorations if desired.

FAQ

WHAT IS THE TASTE OF RAINBOW CAKE?

Rainbow cake may have a whole lot of colors going on, but the cake itself tastes basically just like a vanilla cake. Since the cake mix is white cake and the frosting is plain buttercream, it is a rather simple cake when it comes to flavor. Feel free to add extracts or flavorings into the batter and frosting to add flavor to the cake.

WHAT IS RAINBOW CAKE?

A rainbow cake is a cake full of different colors of the rainbow. Most rainbow cakes are layered with colors like red, orange, yellow, green, and blue. The colors are stacked into cake layers to make show off each color of the rainbow when you slice into it.

HOW DO I STORE RAINBOW CAKE?

A rainbow cake can be stored just like any other plain cake with frosting. The cake will last about a week in an airtight container. You could freeze the cake as well. Simply slice any leftovers and store them in the freezer for up to 3 months. Thaw when you are craving a sweet treat!

MORE RAINBOW TREATS

• Funfetti Dip
• Funfetti Cookies
• Birthday Cake Pancakes
• Funfetti Sugar Cookie Bars