Preheat the oven to 350°F then grease and flour a 9x5-inch loaf pan.
In a medium bowl, whisk together the flour, baking powder, baking soda, salt, cinnamon, and nutmeg.
1 & ½ cup all-purpose flour, ¾ teaspoon baking powder, ¾ teaspoon baking soda, ½ teaspoon salt, 1 teaspoon ground cinnamon, ½ teaspoon ground nutmeg
In a large bowl, whisk together the vegetable oil, granulated sugar, brown sugar, eggs, and vanilla extract until smooth. Stir in the grated carrots.
½ cup vegetable oil, ½ cup granulated sugar, ½ cup brown sugar, 2 large eggs, 1 teaspoon vanilla extract, 1 & ⅓ cup grated carrots
Gradually add the dry ingredients to the wet ingredients, stirring until just combined. Fold in the walnuts then pour the batter into the prepared loaf pan and smooth the top with a spatula.
⅔ cup walnuts
Bake for 60 minutes, or until a toothpick inserted into the center comes out clean.
Remove from the oven and let cool in the pan for 10 minutes. Then, transfer to a wire rack to cool completely.