Preheat oven to 350 degrees. Line two round 9-inch cake pans with parchment paper. Lightly spray with non-stick cooking spray.
In a large bowl, whisk together all-purpose flour, baking powder, cinnamon, nutmeg, and salt.
2 cups all purpose flour, 1 1/2 teaspoons baking powder, 1 teaspoon cinnamon, 1/4 teaspoon nutmeg, 1/2 teaspoon salt
Using another large mixing bowl, whisk brown sugar, white sugar, vegetable oil, eggs and vanilla extract until the ingredients are combined. Set aside.
1 1/2 cups brown sugar, 1 cup sugar, 1 1/4 cups vegetable oil, 4 large eggs, 1 teaspoon vanilla
Slowly add the dry ingredients to the wet ingredients a little at a time, mixing between each addition. Mix until the flour mixture is just incorporated, taking care not to over mix.
Fold grated carrots and one cup of pecans into the cake batter.
2 cups grated carrots, 2 cups chopped pecans
Pour batter into the prepared pans and bake for 35-40 minutes. The cake will be finished baking when a toothpick inserted into the middle of the pans comes out clean. Place cake on wire rack and let cool to room temperature.
While the cake layers are cooling, place one cup of chopped pecans on a rimmed baking sheet and bake for 4-5 minutes until toasted. Set aside.
2 cups chopped pecans