Creating The Best Swiss Carrot Cake is a straightforward process when 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, whisk together flour, sugar, baking powder, baking soda, salt, cinnamon, and nutmeg until well combined.
3. Combine Wet Ingredients: In another bowl, mix together the vegetable oil, eggs, grated carrots, crushed pineapple, and vanilla extract until fully blended.
4. Combine Mixtures: Gradually add the wet ingredients to the dry ingredients, stirring until just combined. Be careful not to overmix.
5. Add Nuts: Fold in the chopped walnuts or pecans, if using, to incorporate some crunch into the batter.
6. Divide Batter: Pour the batter evenly into the prepared cake pans.
7. Bake: Place in the preheated oven and bake for 40-45 minutes, or until a toothpick inserted into the center comes out clean.
8. Cool: Remove from the oven and allow the cakes to cool in their pans for 15 minutes. Then, carefully transfer them to wire racks to cool completely.
9. Prepare Frosting: In a medium bowl, beat together the cream cheese and softened butter until smooth. Gradually add powdered sugar and vanilla extract, mixing until creamy.
10. Frost the Cake: Once the cakes are completely cool, place one layer on a serving platter. Spread a generous amount of cream cheese frosting on top before placing the second layer on top. Frost the top and sides of the cake with the remaining frosting.