Preheat oven to 325 degrees then line the bottom of two 9" cake pans with parchment paper. Spray the pans and paper with cooking spray and set aside.
Add the carrots to the bowl of a food processor fitted with the steel blade, pulse until very finely chopped then set aside. In a large mixing bowl, whisk the sugar, oil and eggs together until completely blended. Add the carrots and stir to combine.
Sift the flour, baking soda, salt, and cinnamon on top of the wet ingredients and carefully fold the wet and dry ingredients until completely blended. If you’d like to add nuts or raisins, now is the time to fold them into the batter (our office voted a unanimous ‘NO’).
Divide the batter evenly into the two prepared 9" cake pans and bake for 45–50 minutes—the cakes will be firm in the center and just beginning to pull away from the sides of the pan.
Remove the cakes from the oven and cool the cakes on a rack for 10 minutes.
When the cakes have rested but are still quite warm, invert the layers onto a sheet of waxed paper. Remove the pan, peel the parchment paper from the bottom of the cake then replace the pan back over the cake to cover it and seal in the moisture. Leave the cakes covered at least 2 hours or until they are completely cooled.
While the cakes are cooling, get started on the cream cheese frosting. Add the softened butter and cream cheese to a medium-sized mixing bowl and cream together until completely combined and no lumps remain. Then, sift in the powdered sugar, stirring until perfectly smooth. Add the vanilla, stir once more to combine then cover with plastic wrap. Store at room temperature until you’re ready to frost the cake.
When the cakes are cool and the frosting has been made, remove the pans to uncover the cakes. Place the first layer on a serving plate and evenly coat the top of the cake with frosting. Place the next layer upside down on top of first layer and press gently but firmly into place. Coat the top and all sides of the cake evenly with the remainder of the frosting.
Refrigerate the cake until ready to serve then slice and enjoy!
One Last Thing
If the frosting is too thick, add a few drops of milk until the consistency’s correct.