Step 1: Preheat your oven to 350°F (175°C). Thoroughly grease and flour a 10-inch bundt pan or a loaf pan to prevent sticking.
Step 2: In a medium bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt until well combined. Set this dry mixture aside.
Step 3: In a large mixing bowl, using an electric mixer, beat the softened unsalted butter and granulated sugar together on medium speed for 3-4 minutes until the mixture is light and fluffy.
Step 4: Add the large eggs to the butter and sugar mixture one at a time, mixing well after each addition until fully incorporated. Then, mix in the vanilla extract until just combined.
Step 5: Gradually add the dry ingredients to the wet mixture, alternating with the room temperature buttermilk. Begin and end with the dry ingredients. Mix on low speed until the batter is just combined; be careful not to overmix.
Step 6: Pour the prepared batter evenly into your greased and floured bundt or loaf pan, using a spatula to smooth the top.
Step 7: Place the pan in the preheated oven and bake for 60-70 minutes, or until a wooden skewer or toothpick inserted into the center of the cake comes out clean.
Step 8: Once baked, remove the cake from the oven and allow it to cool in the pan for about 10-15 minutes. This helps the cake set before attempting to remove it. After cooling slightly, carefully invert the cake onto a wire rack to cool completely.
Step 9: Once fully cooled, slice the cake and serve it plain, or with your favorite toppings such as fresh berries, whipped cream, or a simple glaze. Enjoy your delicious homemade pound cake!