Creating a Nectarine Cake is straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, baking powder, baking soda, and salt.
3. Cream Butter and Sugar: In another bowl, cream together the softened butter and granulated sugar until light and fluffy.
4. Add Eggs: Beat in the eggs one at a time, mixing well after each addition.
5. Combine Wet Ingredients: Stir in the buttermilk and vanilla extract until well combined.
6. Incorporate Dry Ingredients: Gradually add the dry mixture to the wet mixture, stirring until just combined.
7. Add Nectarines: Gently fold in the sliced nectarines, ensuring they are evenly distributed in the batter.
8. Pour Batter: Pour the batter into the prepared baking pan and smooth the top with a spatula.
9. Bake: Bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.
10. Cool: Allow the cake to cool in the pan for about 10-15 minutes, then transfer to a wire rack to cool completely.
11. Dust with Powdered Sugar: Before serving, dust the top with powdered sugar for an elegant finish.

These steps will guide you in creating this incredible Nectarine Cake effortlessly.