BAR AU CHOCOLAT RECIPES

Steps:

• Pour the water into a bread machine pan; add the flour. Sprinkle the milk powder over the flour. Place the sugar, salt, and 2 tablespoons of softened butter into the corners of the pan. Make a small indent in the top of the dry ingredients and put the yeast in the indent. Run the bread machine on the basic dough setting.
• Meanwhile, lay out a sheet of waxed or parchment paper. Shape the remaining 1/2 cup of butter into a 3x5 inch rectangle on the waxed paper; wrap and chill until ready to use.
• Remove the butter from the refrigerator and allow to soften while you roll out the dough. Turn the dough out onto a lightly floured surface. Roll the dough into a 8x12 inch rectangle. Place the butter on half of the dough, leaving a 1/2 inch border of dough on 3 sides. Fold the other half of the dough over the butter and press the edges firmly to seal.
• Roll the dough out to a 6x14 inch rectangle. Fold the dough in thirds from the long ends, as you would fold a business letter. Cover the dough loosely with plastic wrap and refrigerate for 20 minutes.
• Remove the dough from the refrigerator. Place it onto a lightly floured surface so that the folded edge faces you. Roll the dough out again into a 6x14 inch rectangle, and fold into thirds. Cover with plastic and chill for 20 minutes.
• Repeat step 5, chilling for 30 minutes.
• In a small bowl, beat together the egg yolk and milk; set aside. Grease two baking sheets.
• Roll the dough out into a 12x21 inch rectangle. Cut the dough into thirds in both directions, to make 9 rectangles. Divide the chocolate among the rectangles. Lightly brush the egg yolk mixture around the edges of each piece. Starting at a short end, roll each piece of dough around the chocolate as if you were rolling a cigar. Press the edges together to seal.
• Place the pastries onto the prepared baking sheets; cover with greased plastic wrap and allow to rise in a warm place until they have doubled in size, about 30 minutes.
• Preheat oven to 400 degrees F (200 degrees C).
• Brush the top of the pastries with the remaining egg yolk mixture.
• Bake in the preheated oven until golden brown, about 15 minutes. Cool for 5 minutes on the baking sheets, then transfer pastries to wire racks. Serve warm or at room temperature.

Steps:

• Arrange racks in the upper third and lower thirds of the oven. Bring a skillet of water to a simmer over medium-high heat. Transfer the skillet to the floor of the oven and close the door. (The steam released inside the oven will create an ideal proofing environment for the pains au chocolat.) Line two rimmed baking sheets with parchment paper and set aside. 
• Remove the slab of dough from the refrigerator and let sit for 5 minutes at room temperature. Unwrap (save the plastic for proofing) and place on a very lightly floured surface. If the dough has shrunk during chilling, roll it out again to a slab that’s 16 inches long and 15 inches wide. Dust off any excess flour with a pastry brush. 
• Use a wheel cutter to trim 1/2 inch of dough from all four sides, straightening and squaring them off, creating a slab that’s 15 inches long by 14 inches wide. Using a ruler, cut the slab lengthwise into 5 equal strips each measuring 3 inches wide. Cut each strip in half crosswise, creating 10 rectangles.
• Working one rectangle at a time, place a stick of chocolate along one of the shorter sides, leaving about a 1-inch border. Fold the pastry over the chocolate until it’s wrapped around one time, then tuck another bar of chocolate into the fold. Wrap the pastry around the second bar of chocolate and continue to roll until you have a snug spiral. Transfer the pain au chocolat to a prepared baking sheet, resting it on the seam. Repeat with the remaining dough and chocolate, dividing between the baking sheets and spacing evenly. Very loosely cover with plastic wrap so the pastries have some room to expand. 
• Open the oven and stick your hand inside — it should be humid but not hot, as the water in the skillet will have cooled. You want the pains au chocolat to proof at 70 to 75 degrees. (Any hotter and the butter will melt, leading to a denser pastry.) Gently place the baking sheets inside the oven and let the pastries proof until they’re doubled in size, extremely puffy, and jiggle delicately on the baking sheet, 2 to 2 1/2 hours. 
• Remove the baking sheets from the oven and carefully uncover them. Transfer to the refrigerator and chill for 20 minutes while you heat the oven. Remove the skillet from the oven and heat to 375 degrees.
• In a small bowl, stir the yolk and heavy cream until streak-free. Remove the baking sheets from the refrigerator and use a pastry brush to gently brush each pain au chocolat with the yolk mixture. Transfer the sheets to the oven and bake for 20 minutes. Rotate the baking sheets and switch racks, and continue to bake until the pains au chocolat are deeply browned, another 10 to 15 minutes. Remove from the oven and let cool completely on the baking sheets.