To make carrot cake cookies with cream cheese frosting, preheat the oven to 350 degrees F. Also, line two cookie sheets with parchment paper.
In a large bowl, combine together melted butter, brown sugar, sugar, egg, and vanilla extract. Add the shredded carrots and mix until combined.
Mix in half the flour and oats, along with the baking soda, baking powder, cinnamon, and ground nutmeg. Then mix in the remaining flour and oats.
Using a cookie scoop, scoop out the cookie dough leaving at least an inch between cookies. Gently flatten the cookies a little bit.
Bake for 10-12 minutes. Leave the cookies on the cookie sheet for a couple of minutes before placing them on a cooling rack to cool.
To make the frosting, combine the cream cheese, butter, vanilla extract, and powdered sugar. If the frosting is too thin add more powdered sugar and if the frosting is too thick add a little milk.
Once the cookies are cooled, frost the top with the frosting and top with shredded carrots, oats, and/or a sprinkle of cinnamon.