Bacon, Cheese, and Chive Buns
Body
For dough: ½ cup whole milk 2 ¼ teaspoons active dry yeast (one ¼ ounce package) 2 tablespoons sugar 4 tablespoons unsalted butter, melted, plus more for the bowl and plastic wrap. 1 large egg yolk 2 ¾ cups all-purpose flour, plus more for the work surface.