Creating this delightful Brown Butter Nectarine Cake is simple if you follow these steps:

1. Preheat the Oven: Set your oven to 350°F (175°C). Grease and flour a 9-inch round cake pan.
2. Brown the Butter: In a medium saucepan over medium heat, melt the butter. Continue cooking, stirring frequently, until it turns golden brown and smells nutty. Be careful not to let it burn. Remove from heat and let it cool slightly.
3. Mix Dry Ingredients: In a bowl, whisk together flour, baking powder, baking soda, and salt. Set aside.
4. Combine Wet Ingredients: In a large bowl, beat the eggs and sugar together until light and fluffy. Mix in the browned butter and vanilla extract until well combined.
5. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Do not overmix.
6. Add Nectarines: Gently fold in the sliced nectarines, ensuring they are evenly distributed throughout the batter.
7. Pour Batter: Pour the batter into the prepared cake pan and spread it evenly.
8. Bake: Place in the preheated oven and bake for 40-45 minutes, or until a toothpick inserted in the center comes out clean.
9. Cool: Once baked, remove from the oven and let the cake cool in the pan for about 15 minutes. Then, carefully transfer it to a wire rack to cool completely.
10. Dust with Powdered Sugar: Before serving, dust the top of the cake with powdered sugar for a beautiful finish.

By following these steps, you’ll create a delightful Brown Butter Nectarine Cake that is sure to impress!