01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, cinnamon, ginger, nutmeg, baking soda, baking powder, and salt until well blended.
03 - In a large bowl, beat the softened butter, brown sugar, and granulated sugar together until light and fluffy, approximately 2-3 minutes.
04 - Beat in the egg and vanilla extract until fully incorporated into the mixture.
05 - Stir the finely grated carrots into the wet mixture until evenly distributed.
06 - Gradually add the dry ingredients to the wet mixture, mixing until just combined. Avoid overmixing to prevent tough cookies.
07 - Gently fold in rolled oats, chopped nuts, and raisins until evenly distributed throughout the dough.
08 - Drop tablespoon-sized mounds of dough onto the prepared baking sheets, spacing cookies 2 inches apart to allow for spreading.
09 - Bake for 11-13 minutes until edges are golden brown and centers are set. Allow cookies to cool on the baking sheet for 5 minutes before transferring.
10 - Beat cream cheese and softened butter together until smooth and creamy. Add powdered sugar, vanilla extract, and pinch of salt; continue beating until light and fluffy.
11 - Once cookies have cooled completely, spread or pipe the cream cheese frosting onto each cookie as desired.