Creating this incredible Carrot Cake is simple if you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
2. Mix Dry Ingredients: In a large bowl, sift together the flour, sugar, baking soda, baking powder, cinnamon, nutmeg, and salt.
3. Combine Wet Ingredients: In another bowl, whisk together the vegetable oil, eggs, grated carrots, crushed pineapple, and vanilla extract until well combined.
4. Combine Mixtures: Gradually add the wet ingredients to the dry ingredients, stirring until just combined.
5. Add Nuts: If using, fold in the chopped walnuts or pecans for added texture.
6. Divide Batter: Pour the batter evenly into the prepared cake pans.
7. Bake: Place in the oven and bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean.
8. Cool: Remove from the oven and allow the cakes to cool in their pans for 10 minutes. Then, gently transfer them to wire racks to cool completely.
9. Prepare Frosting: While the cake cools, make the cream cheese frosting by beating the softened cream cheese and butter together. Gradually add the powdered sugar and vanilla extract, mixing until smooth and fluffy.
10. Assemble the Cake: Once the cakes are completely cool, place one layer on a serving platter. Spread a generous amount of frosting on top, then place the second layer on top and frost the top and sides of the cake.