Preheat the oven to 350°F (175°C) and grease a 9×13 inch baking pan.

In a large bowl, whisk together the grated carrots, granulated sugar, brown sugar, and vegetable oil until well blended.

Add the eggs one by one, mixing in the crushed pineapple, baking soda, baking powder, cinnamon, nutmeg, and salt, until the mixture is smooth.

Gently fold in the flour until just incorporated.

Pour the batter into the prepared pan and smooth the top.

Bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean.

While the bars are cooling, prepare the cream cheese frosting. Beat together the softened cream cheese and butter until creamy.

Gradually add the powdered sugar and vanilla extract, mixing until fluffy.

Once the bars are completely cool, spread the frosting generously over the top.

Cut into squares, serve, and enjoy.