For the cookies:

1. Preheat your oven to 350 degrees. In the bowl of an electric mixer, cream together the butter, sugar and brown sugar on medium speed until light and fluffy, about a couple minutes. Reduce the speed to low and add in one egg at time, making sure to wipe down the sides of the bowl in between each addition. Mix in the vanilla extract.
2. Add in the flour, baking soda, salt, cinnamon and oats on low speed until combined and a cookie batter has formed. Gently mix in the shredded carrot until combined. Using a medium-sized cookie scoop, scoop the cookie batter out onto baking sheets, placing them a couple inches apart.
3. Bake for 11-12 minutes, or until the cookies are slightly golden brown. Let the cookies cool slightly on the baking sheets before transferring them to a cooling rack to cool completely.

For the frosting:

1. In the bowl of an electric mixer, cream together the cream cheese and butter on medium speed until smooth, about a couple minutes. Reduce the speed to low and add in one cup of powdered sugar at a time until a smooth frosting forms.Mix in the vanilla extract.

To assemble:

1. Once the cookies are completely cooled, flip half of the cookies over and evenly spread about a 1-2 tablespoons of the frosting on each bottom, stay away from the edges of the cookies. Top each frosted bottom with a cookie top and gently push together to form a frosted cookie sandwich. The frosting should be evenly at the sides and not spilling out. Enjoy!