25-Minute Rainbow Layer Cake
Stack store-bought pound cake slices with vibrant gel food coloring and whipped buttercream for an Instagram-worthy rainbow cake in under 30 minutes. No baking required—just color, frost, and serve.
- Total time
- 25 min
- Servings
- 8
- Calories
- 520
- Protein
- 3g
Ingredients
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Open the appInstructions
Step 1
Beat softened butter and powdered sugar until pale and fluffy, about 2 minutes.
Step 2
Add cream and vanilla, then beat until smooth. Divide frosting into 6 bowls.
Step 3
Add one gel color to each bowl, stirring until evenly tinted. Start with 2-3 drops per color.
Step 4
Slice pound cake into 12 thin layers (about 1/4-inch thick) using a serrated knife.
Step 5
Layer cakes on a plate or cake stand: spread 1 tbsp colored frosting between each layer, rotating colors (red, orange, yellow, green, blue, purple).
Step 6
Frost the outside with any remaining buttercream, then top with sprinkles if desired. Serve immediately or chill up to 2 hours.
Tools you’ll need
- electric mixer or whisk
- 6 small bowls
- serrated bread knife
- offset spatula or butter knife
- cake plate or stand
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