Simple Chocolate Mousse Pie

1-1/2 pkg. (12 squares) BAKER'S Semi-Sweet Baking Chocolate  
2 cups whipping cream, divided  
2 tsp. powdered sugar  
1 tsp. vanilla  
1 OREO Pie Crust (6 oz.)  
 
 MICROWAVE chocolate and 3/4 cup of the cream in large microwavable bowl on HIGH 2 minutes. 
Stir until chocolate is completely melted. 
Cool 20 minutes or until at room temperature, stirring occasionally.  
BEAT remaining 1-1/4 cups cream, sugar and vanilla in chilled large bowl with electric mixer on medium speed 
until medium peaks form. 
Gently stir 1/2 of the whipped cream mixture into chocolate mixture until well blended. 
Gently stir in remaining whipped cream mixture. 
Spoon into crust.  
REFRIGERATE 4 hours or until ready to serve.