Trim a thin layer of both cakes to level them with a serrated knife to ensure they stack evenly.
Place a small amount of frosting on the center of your cake stand or serving plate.
Place one layer of the cake on the prepared cake stands or plate.
Add 8-9 scoops of cream cheese frosting and spread it evenly with an offset spatula.
Place the second carrot cake on top of the frosting.
Apply a crumb coat by spreading a thin layer of cream cheese frosting over the entire cake. This layer seals in any crumbs and creates a smooth surface for the final coat. Chill the cake in the refrigerator for about 30 minutes.
After the crumb coat has set, apply a thick layer of cream cheese frosting. Smooth it out or create a pattern with an offset spatula.
Prepare a piping bag fitted with a star nozzle and fill it with the remaining cream cheese frosting. Pipe the frosting on the cake.
Decorate it with cake trimmings.
Refrigerate the assembled cake for at least 30 minutes to allow the frosting to set and make slicing easier.
Once the cake has chilled and the frosting is set, remove it from the refrigerator and let it come to room temperature for about 10-15 minutes before serving. This allows the flavors to fully develop. Enjoy!