Heat the semi-sweet chocolate chips in the microwave for 45 seconds. Stir and continue heating for 15 second intervals, stirring in between, until smooth. Set aside to cool.
Beat softened cream cheese.
Add the melted semi-sweet chocolate, cocoa powder, powdered sugar and whipped topping. Beat until smooth.
Spread in pan over the crust and place in the fridge for at least 1 hour.