1Heat oven to 350°F. Spray 24 miniature muffin cups with cooking spray. Place 1 piece of cookie dough in each muffin cup; press in bottom and up side, forming cup shape.
2Bake 12 to 14 minutes or until light golden brown. Cool completely in pans on cooling racks.
3In chilled medium bowl, beat whipping cream with electric mixer on medium speed until soft peaks form. Add powdered sugar, cocoa and vanilla. Beat on high speed until stiff peaks form. Spoon chocolate cream into decorating bag fitted with #1mm star tip.
4Carefully remove cookie cups from pans. Pipe chocolate cream into cups. Store in refrigerator.