Preheat oven to 395 degrees Fahrenheit.
In a saucepan, over low heat, whisk 1 stick butter and 1 ¼ cup whole milk until butter melts, but the milk is not hot (if it is, let it cool down a bit). Transfer the milk and butter mixture to a large mixing bowl.
Meanwhile, in another mixing bowl, whisk together 1 pound flour, 1 tablespoon baking powder, and one teaspoon salt.
Pour the half of the dry ingredients (eyeball it) into the milk and butter mixture and mix with a wooden spoon until well incorporated and lump-free, about 2 minutes. Pour in the remainder of the dry ingredients and mix until blended.
Transfer the dough on a lightly floured clean surface and knead until the dough is smooth, for about 3-4 minutes. The dough should not be sticky, but it should be soft and pliable!
Shape the dough into a loaf and place it on a piece of parchment paper. Transfer to a 9" loaf pan. Brush the top with egg yolk. At this point, you can slash the dough with a very sharp serrated knife a few times if you wish.
Bake on the middle rack for 30 minutes. Let cool completely before slicing. Enjoy!
