Frozen Mud Pie

1-1/2 cups cream-filled chocolate sandwich cookie crumbs
1-1/2 teaspoons sugar, optional
1/4 cup butter or margarine, melted
2 pints chocolate chip or coffee ice cream, softened
1/4 cup chocolate syrup, divided
Additional cream-filled chocolate sandwich cookies, optional

In a bowl, combine cookie crumbs and sugar if desired. Stir in butter. Press onto the bottom and up the sides of an ungreased 9-in. pie plate. Refrigerate for 30 minutes. Spoon 1 pint of ice cream into crust. Drizzle with half of the chocolate syrup; swirl with knife.

Carefully top with remaining ice cream. Drizzle with remaining syrup; swirl with a knife. Cover and freeze until firm. Remove from the freezer 10-15 minutes before serving. Garnish with whole cookies if desired. Makes 8 servings.