Step 1: Prep the Pan & Towel
Preheat oven to 350°F (175°C).
Line a raised-edge cookie sheet with parchment paper and spray with nonstick spray.
Generously sprinkle a clean kitchen towel with powdered sugar and set aside.
Step 2: Make the Cake
Prepare the carrot cake batter according to package directions or your own recipe.
Fold in the grated carrots.
Pour batter evenly into the prepared pan and bake for 15 minutes, or until a toothpick inserted in the center comes out clean.
Step 3: Roll the Cake
Immediately turn the hot cake out onto the sugared towel.
Carefully peel off the parchment paper.
Fold the towel over the short ends, then gently roll the cake from one short end into a log.
Let cool for 45–60 minutes.
Step 4: Make the Frosting