01 - Combine flour, salt, and yeast in a large bowl. Add lukewarm water and mix until a rough dough forms. Knead for 5–7 minutes until smooth and elastic. Cover and let rise for 1 hour at room temperature until doubled in size.
02 - Place cold butter between two sheets of parchment paper. Pound and roll into a 6-inch square. Refrigerate until firm but pliable, about 15–20 minutes.
03 - On a lightly floured surface, roll the risen dough into a 12-inch square. Place the butter square in the center and fold the dough edges over the butter, sealing completely to prevent leakage.
04 - Roll the dough into a 16 x 8-inch rectangle. Sprinkle 1/3 cup sugar evenly over the surface. Fold the dough into thirds like a letter.
05 - Rotate the dough 90 degrees, roll out again to 16 x 8 inches, and sprinkle with another 1/3 cup sugar. Fold into thirds. Repeat once more with remaining sugar for a total of three turns. Wrap and refrigerate for 30 minutes.
06 - Generously butter a 9-inch round cake pan and dust with 1 tablespoon sugar, tapping out any excess.
07 - Roll the chilled dough into a 14-inch circle. Fold edges inward to form a rough square, then turn over seam side down and gently shape to fit the cake pan. Press dough evenly into the pan.
08 - Cover loosely with plastic wrap and let rise for 30–45 minutes at room temperature until slightly puffed.
09 - Preheat oven to 400°F. Bake for 30–35 minutes until deep golden brown and heavily caramelized. If the top browns too quickly, cover loosely with foil for the last 10 minutes.
10 - Let cool in the pan for exactly 5 minutes, then immediately invert onto a wire rack to prevent sticking. Serve warm or at room temperature.