Chocolate Rugelach

Make the dough by combining the cream cheese, butter, flour and salt in the bowl of a food processor. Pulse the ingredients together until the fat becomes evenly dispersed within the flour (the dough will be crumbly but still stick together). Shape the dough into a ball, place it into a bowl and cover the bowl with plastic wrap. Refrigerate the dough for one hour or up to one day. Remove the dough from the refrigerator and cut it into 4 pieces. Place 3 pieces back into the refrigerator. Combine the cinnamon and sugar in a small bowl. Set aside. Place the ball of dough on a lightly floured surface, and using a rolling pin, roll it into a circle that's about 1/8-inch thick. The dough will be very hard, so it's best to first beat it down with a rolling pin (as if you were making puff pastry). It will loosen up as it comes to room temperature. Immediately brush the rolled out dough with one-fourth of the melted butter and sprinkle it with one-fourth of the cinnamon-sugar mixture. Sprinkle one-fourth of the chocolate onto the dough, pressing it lightly into the dough. Cut the dough into 12 wedges. Roll each wedge up, starting from the thickest end, until you form a crescent shape. Repeat the rolling, topping and shaping process with the other three pieces of dough. Place the rugelach on a parchment paper-lined baking sheet and refrigerate it for 30 minutes. (You can also freeze the rugelach at this point for later use.) Bake the rugelach in a 350 ºF oven for 18 to 20 minutes until golden brown. Transfer the rugelach to a cooling rack and let cool completely.