the 6 ounces chocolate and the 2 tablespoons butter. cook and stir over low heat until melted. whisk chocolate mixture into the 1-1/4 cups pumpkin mixture. pour over crust, spreading evenly. bake for 15 minutes.
4. carefully pour the remaining pumpkin mixture over baked chocolate layer, spreading evenly. bake for 40 to 45 minutes more or until filling is puffed and center is set. cool on a wire rack for 30 minutes.
5. in a small bowl, combine sour cream and 1/4 cup sugar. gently spread over cookies. cool completely. cover and chill for at least 3 hours. cut into bars.* before serving, sprinkle with nutmeg and/or chocolate curls. makes 24 to 