Preheat your oven to 350°F (175°C). This ensures that the cookies bake evenly and rise properly.

In a large mixing bowl, cream together the softened butter, brown sugar, and granulated sugar using an electric mixer on medium speed until the mixture is light and fluffy, about 3-4 minutes. This process incorporates air into the mixture, helping the cookies to be soft.

Add the eggs one at a time, mixing well after each addition. This helps to emulsify the mixture, ensuring a smooth and uniform dough.

In a separate bowl, whisk together the sifted flour, baking soda, baking powder, ground cinnamon, ground nutmeg, and salt. Sifting the flour helps to aerate it and remove any lumps.

Gradually add the dry ingredients to the wet mixture, mixing on low speed until just combined. Avoid over-mixing to keep the cookies tender.

Fold in the shredded carrots, chopped walnuts, and raisins (if using) with a spatula until evenly distributed throughout the dough.

Line a baking sheet with parchment paper. This prevents the cookies from sticking and makes for easy cleanup.

Using a cookie scoop or tablespoon, drop rounded balls of dough onto the prepared baking sheet, spacing them about 2 inches apart to allow for spreading.

Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden and the centers look set. The cookies will continue to firm up as they cool.

Remove from the oven and let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.

In a medium bowl, beat the softened cream cheese and butter together until smooth and creamy, about 2-3 minutes.

Gradually add the sifted powdered sugar and vanilla extract, mixing until well combined and fluffy. This frosting adds a rich and tangy flavor that complements the cookies beautifully.

Once the cookies are completely cooled, spread a generous amount of cream cheese frosting on top of each cookie, if desired. Alternatively, serve them plain for a lighter treat.

Enjoy your delicious carrot cake cookies with a cup of tea or coffee!