Note: If you want pretty, melted pools of chocolate and toffee on top of your cookies, hold back about 1/3 cup of the chopped chocolate and 1/4 cup of the toffee bits that gets mixed into the dough. After the cookies have been baking for 5 minutes, arrange a few chocolate nuggets and toffee bits on top of each partially baked cookie and continue baking for about 5 more minutes.