• Additional butter to grease molds
• 1 c. sugar, divided, plus additional sugar for sprinkling on counter and dough
The day before you plan to serve the pastries: Whisk together flour, yeast and salt in a medium bowl. Add 1 1/4 cups water and mix to combine. (If dough seems dry, add 1 tablespoon water.) If using a stand mixer, continue mixing for 3 to 4 minutes. By hand, knead dough for 3 to 4 minutes until smooth and springy. Place dough in a bowl sprayed with cooking oil, cover with plastic wrap and let rise in a warm place until doubled, about an hour. Place risen dough in refrigerator to chill for 1 hour.
Take out 1 1/2 sticks butter and let sit at room temperature. Just before you remove dough from refrigerator, cut butter into thin slices no thicker than 1/4 inch.
Turn out chilled dough onto a well-floured counter and roll into a 10- by 18-inch rectangle, keeping corners as square as possible. Arrange the butter pats evenly over two-thirds of the dough. Fold unbuttered third of the dough over the butter. Brush off excess flour, then fold over again to enclose all the butter, as if folding a letter. Pinch the seam closed.