01 - In a large bowl, combine flour, sugar, salt, and yeast, ensuring yeast does not directly contact salt. Add lukewarm milk, melted butter, and egg. Mix thoroughly until a sticky, cohesive dough forms.
02 - Knead dough for 7–10 minutes until smooth and elastic. Transfer to a greased bowl, cover, and let rise for 1 hour until doubled in volume.
03 - Punch down risen dough and shape into a rectangle. Cover and refrigerate for 30 minutes to firm.
04 - On a lightly floured surface, roll chilled dough into a 12 x 16-inch rectangle. Arrange cold butter slices over two-thirds of the dough surface.
05 - Fold the unbuttered third over the butter section, then fold remaining third on top to create a neat rectangle. Rotate dough 90° so folded edges face you.
06 - Roll dough again into a 12 x 16-inch rectangle. Perform another letter fold into thirds. Wrap and refrigerate for 30 minutes.
07 - Repeat the rolling, folding, and refrigerating process two more times, completing three total turns. This creates the signature flaky layers.
08 - After the final chill, roll dough to approximately 8 x 16 inches. Roll tightly from the short edge into a cylinder, forming a loaf shape.
09 - Place loaf seam-side down in a greased 9 x 5-inch loaf pan. Cover loosely and let rise until doubled, about 1 hour.
10 - Preheat oven to 375°F. Whisk egg with 1 tablespoon milk for egg wash. Brush evenly over the entire loaf surface.
11 - Bake for 35–40 minutes until deep golden brown and loaf sounds hollow when tapped. Tent with aluminum foil if top browns too quickly.
12 - Allow loaf to cool in pan for 10 minutes, then transfer to wire rack. Cool fully before slicing to preserve texture.