Grease and flour a loaf pan. Preheat oven to 350F.

In a medium bowl, whisk together flour, baking powder, salt and sugar.

In a mixing bowl beat butter just until softened. Add dry ingredients, egg yolks and 1/2 cup of the milk and mix just until moistened. Then beat on medium for 2 minutes.

Add remaining milk and beat on medium for 1 more minute.

Pour batter into pan and tap on counter to smooth it out. Bake at 350F for 1 hour or until toothpick inserted into the middle comes out clean.

Let cool for 10 minutes in the pan, then turn out and cool completely on a rack.

Frost the top with your choice of icing - I often use a lemon butter cream.