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Step 5: Assemble the Cake
- Place one cake layer on a serving platter or cake stand. Spread a layer of frosting evenly over the top.
- Repeat with the remaining cake layers, stacking them on top of each other and frosting between each layer.
- Use the remaining frosting to cover the top and sides of the cake, smoothing it out with a spatula.
Step 6: Decorate the Cake
- Decorate the cake with rainbow sprinkles around the bottom edge and on top, if desired.
- If you like, use additional frosting to pipe decorative swirls or patterns on top of the cake.
Step 7: Serve and Enjoy
- Slice the cake into generous portions and serve with a tall glass of milk or your favorite hot beverage.
- Indulge in the deliciousness of this Copycat Costco Vanilla Cake, savoring each bite of its moist cake and creamy frosting.
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