Step 1: Combine the bread flour, granulated sugar, instant yeast, and kosher salt in a large mixing bowl, whisking well.
Step 2: Create a well in the center, pour in the warm water and softened butter, then mix until a shaggy dough forms.
Step 3: Knead the dough on a lightly floured surface for about 8-10 minutes until smooth and elastic.
Step 4: Form the dough into a ball, place it in a greased bowl, cover with a kitchen towel, and let it rise for 1-2 hours until doubled in size.
Step 5: Punch down the risen dough, turn it out onto a floured surface, shape into a rectangle, and roll tightly into a log.
Step 6: Place the shaped dough into a greased loaf pan, cover again, and let it rise for another 30-45 minutes until it rises above the rim.
Step 7: Preheat the oven to 375°F (190°C).
Step 8: Bake the loaf for 25-30 minutes until golden brown and sounds hollow when tapped.
Step 9: Let the bread cool in the pan for 10 minutes, then transfer to a cooling rack to cool completely before slicing.