Preheat the oven to 325°F. Spray a 10-inch Bundt pan with nonstick spray
Combine the flour, baking powder, and salt in a large bowl until blended. Whisk the eggs in a medium bowl until frothy. Whisk in the milk and sour cream.
With an electric mixer on medium speed, beat the butter until smooth and creamy, about 1 minute. Gradually add the sugar and beat until light and fluffy, about 2 minutes. Reduce the speed to low. Alternately add the flour mixture and the milk mixture, beginning and ending with the flour mixture and beating just until blended.
Scrape the batter into the pan. Bake until a toothpick inserted into the center comes out clean about 55 – 60 minutes. Do not overbake. Let cool in the pan on a rack 10 minutes. Remove the cake from the pan and let cool completely on the rack.