5th Turn: Roll the dough into a 20 x 40 cm rectangle and perform a letter fold.
6th Turn: Rotate the dough 90 degrees, roll out to 20 x 40 cm, and perform a final letter fold.
Wrap and refrigerate for 2 hours.
Sugar Lamination - 7th Turn: Generously sprinkle sugar on your work surface and the top of the dough. Roll out to a 20 x 40 cm rectangle. Sprinkle more sugar on top and gently press it in. Perform a letter fold.
8th Turn:Rotate, roll out to 20 x 40 cm, sprinkle with sugar, and perform a final letter fold.
Wrap the dough and refrigerate for 40 minutes.
Shaping the Palmiers: Cut the dough in half. Refrigerate one half while working with the other.
On a surface sprinkled with sugar, roll one half of the dough into a rectangle about 0.6 cm (1/4 inch) thick.
Trim the edges to create a neat rectangle. Generously sprinkle sugar over the entire surface.
Fold the two long sides inward so they meet in the center. Sprinkle with more sugar.
Fold one half over the other, like closing a book. You now have a long log.
Wrap the log in plastic wrap and place it in the freezer for 40 minutes. Repeat the same process with the second half of the dough.
Baking: Preheat your oven to 400°F (204°C). Line baking sheets with parchment paper or silicone mats.
Remove one log of dough from the freezer. Using a sharp knife, cut it into 1 cm (1/2 inch) thick slices.
Coat both sides of each slice in sugar.
Place the slices on the prepared baking sheets, leaving about 2 inches between them as they will expand. Bake in small batches (about 6 per sheet).
Bake for about 15 minutes, or until the tops are lightly golden brown.
Carefully flip each Palmier and bake for another 8-10 minutes, until the second side is golden brown.
Immediately transfer the cookies to a wire rack to cool completely. They will crisp up as they cool.