To melt in double boiler, put about 1 inch of water in a pot. Heat until it simmers, and then turn the heat to low. Put your glass bowl on top of the pot, making sure that it is not touching the water below. Stir the chocolate, until melted. Very carefully remove the bowl. There will be a lot of steam that was trapped underneath the bowl.
Spread mixture into prepared pan. Freeze for 30 minutes.Remove pan and put on cutting board. Cut into 1 inch squares. Ours were more like 1 inch by 2 inches long, because we wanted them to look more like candy bars. Return bars back to the freezer for 20 minutes.