Follow these steps to create your own magnificent Neapolitan Cake:

1. Preheat the Oven: Set your oven to 350°F (175°C). Grease and flour three 8-inch round cake pans.
2. Mix Dry Ingredients: In a large bowl, sift together the flour, granulated sugar, cocoa powder, baking powder, and salt.
3. Combine Wet Ingredients: In another bowl, whisk together the buttermilk, vegetable oil, eggs, and vanilla extract until well blended.
4. Combine Mixtures: Gradually mix the wet ingredients into the dry ingredients, stirring until the batter is smooth.
5. Divide Batter: Divide the batter into three bowls. In one bowl, mix in the cocoa powder for the chocolate layer. In the second bowl, keep it plain for the vanilla layer. In the third bowl, carefully fold in pink food coloring and the strawberry extract for the strawberry layer.
6. Bake: Pour each batter into the prepared pans. Bake in the oven for 30-35 minutes or until a toothpick inserted comes out clean.
7. Cool the Cakes: Remove from the oven and let the cakes cool in their pans for 20 minutes. Afterward, transfer to wire racks to cool completely.
8. Prepare Frosting: In the meantime, prepare the buttercream frosting by beating the softened butter in a mixing bowl until creamy. Gradually add the powdered sugar and heavy cream, continuing to mix until fluffy. Add the vanilla extract once well combined.
9. Assemble the Cake: Once the cakes are completely cooled, place the vanilla layer on a serving platter. Spread a generous amount of frosting over the top.
10. Layer the Cakes: Top with the chocolate layer and brush with more frosting. Finally, place the strawberry layer on top and frost the entire cake with any remaining buttercream.
11. Decorate: Optionally, decorate with sprinkles or fresh berries for added visual appeal.

By following these steps, you’ll successfully create a vibrant Neapolitan Cake that is sure to delight!