Directions:

Cake: Preheat oven to 350 degrees Fahrenheit. Prepare and bake cake mix as directed on package in 2 (9-inch) round cake pans. Cool in pan 5 minutes. Invert onto wire rack; remove pans. Cool completely.
Glaze: Melt chocolate in small microwaveable bowl on HIGH 1 to 2 minutes or until chocolate is melted, stirring after 30 seconds. Blend in butter. Set aside to slightly thicken, about 5 minutes.
Filling: Beat cream cheese and sugar in large bowl with electric mixer on medium speed until well blended. Gently stir in whipped topping and crushed cookies. Place 1 of cake layers on serving plate, top-side down. Spread top of cake layer evenly with cream cheese mixture. Place remaining cake layer on top, top-side up. Spoon glaze to cover top of cake only.