Chocolate Chip Ice Cream Pie

I found this recipe years ago and am now copying it here from our family cookbook binder. Enjoy!

Chocolate Chip Ice Cream Pie

½ cup chocolate syrup 

1/3 cup semisweet chocolate chips 

2 cups crisp rice cereal

1/4 cup sour cream

1 quart chocolate chip ice cream, softened 

Coat bottom and sides of an 8 in. pie plate lightly with butter.  Combine chocolate syrup and chocolate chips in small bowl.  Microwave on high until hot, about 45 seconds.  Stir until smooth.  Reserve ¼ cup of the chocolate mixture.  Combine remaining chocolate mixture and cereal in medium bowl and mix to coat cereal.  Press mixture over bottom and up sides of prepared pie plate.  Freeze until firm, about 15 minutes.  Combine reserved chocolate mixture and the sour cream in a small bowl and mix well.  Spread half the ice cream in the prepared pie plate.  Drizzle with half the sour cream mixture.  Top with remaining ice cream and drizzle with remaining sour cream mixture.  Freeze pie, covered, until firm, about 1 hour.