A rainbow layer birthday cake is a show-stopping, colorful treat that’s surprisingly easy to make! Here’s a step-by-step guide to creating it:
Ingredients
- Cake Batter: Make your favorite white or vanilla cake batter (either from scratch or using a box mix) that yields about six thin layers.
- Food Coloring: Gel food coloring works best, as it’s vibrant and won’t thin out the batter.
- Frosting: Vanilla buttercream or cream cheese frosting to layer between each color and cover the cake.
- Optional Toppings: Rainbow sprinkles, edible glitter, or a drip decoration for added flair.
Steps to Make a Rainbow Layer Cake
1. Divide the Batter
Start by making a big batch of cake batter, then divide it equally into six bowls. Each bowl will become one layer in a different color.
2. Add Food Coloring
Add gel food coloring to each bowl, stirring until the color is evenly mixed. Use red, orange, yellow, green, blue, and purple to create a classic rainbow.
3. Bake the Layers
Bake each layer in a separate 8- or 9-inch cake pan (or bake in batches if you have fewer pans). Follow the baking time on your recipe but adjust if making thinner layers. Let each layer cool completely.
4. Layer with Frosting
Spread a thin, even layer of frosting between each cake layer, stacking them in rainbow order. Start with purple at the bottom and go up to red.
5. Frost the Outside
Once stacked, cover the entire cake with a “crumb coat” of frosting (a thin layer to catch crumbs) and chill for about 20 minutes. Then, apply a final smooth layer of frosting.
6. Decorate
Add any extra decorations like rainbow sprinkles on top, a drip effect with chocolate or colorful ganache, or even fresh fruit or meringues.
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| Birthday cake |
When you slice into the cake, the vibrant rainbow colors inside make for a delightful surprise!
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