Ingredients

  • 1 1/2 cups whole milk, heated to warm (105F110F)
  • 1/4 cup packed light brown sugar
  • 1 tablespoon plus 1/4 teaspoon active dry yeast (from two 1/4-oz packages)
  • 3 3/4 to 4 1/2 cups unbleached all-purpose flour
  • 1 tablespoon kosher salt
  • 3 sticks (1 1/2 cups) cold unsalted butter
  • Special equipment: a standing electric mixer with dough hook, 2 kitchen towels (not terry cloth), a ruler, a pastry brush

Method

  • Stir together warm milk, brown sugar, and yeast in bowl of standing mixer and let stand until foamy, about 5 minutes.
  • (If it doesnt foam, discard and start over.)
  • Add 3 3/4 cups flour and salt and mix with dough hook at low speed until dough is smooth and very soft, about 7 minutes.
  • Transfer dough to a work surface and knead by hand 2 minutes, adding more flour as necessary, a little at a time, to make a soft, slightly sticky dough.
  • Form dough into a roughly 1 1/2-inch-thick rectangle and chill, wrapped in plastic wrap, until cold, about 1 hour.
  • After dough has chilled, arrange sticks of butter horizontally, their sides touching, on a work surface.
  • Pound butter with a rolling pin to soften slightly (butter should be malleable but still cold).
  • Scrape butter into a block and put on a kitchen towel, then cover with other towel.
  • Pound and roll out on both sides until butter forms a uniform 8- by 5-inch rectangle.
  • Chill, wrapped in towels, while rolling out dough.
  • Unwrap dough and roll out on a lightly floured surface, dusting with flour as necessary and lifting and stretching dough (especially in corners), into a 16- by 10-inch rectangle.
  • Arrange dough with a short side nearest you.
  • Put butter in center of dough so that long sides of butter are parallel to short sides of dough.
  • Fold as you would a letter: bottom third of dough over butter, then top third down over dough.
  • Brush off excess flour with pastry brush.
  • Turn dough so a short side is nearest you, then flatten dough slightly by pressing down horizontally with rolling pin across dough at regular intervals, making uniform impressions.
  • Roll out dough into a 15- by 10-inch rectangle, rolling just to but not over ends.
  • Brush off any excess flour.
  • Fold in thirds like a letter, as above, stretching corners to square off dough, forming a 10- by 5-inch rectangle.
  • (You have completed the first "fold.")
  • Chill, wrapped in plastic wrap, 1 hour.
  • Make 3 more folds in same manner, chilling dough 1 hour after each fold, for a total of 4 folds.
  • (If any butter oozes out while rolling, sprinkle with flour to prevent sticking.)
  • Wrap dough tightly in plastic wrap and chill at least 8 hours but no more than 18 (after 18 hours, dough may not rise sufficiently when baked).