Preheat your oven to 350°F (175°C). Grease and line a 9x13-inch baking pan for easy removal.

In a large bowl, whisk together the melted butter, granulated sugar, and brown sugar until glossy. Add the eggs and vanilla, blending until smooth.

Stir in the cocoa powder, flour, and salt until a thick brownie batter forms. Spread evenly into the prepared pan.

Bake for 20 to 24 minutes, until the center is set. Let cool completely before adding layers.

For the filling, beat together softened cream cheese, powdered sugar, and vanilla until smooth. Fold in whipped topping gently.

Spread the cream filling over the cooled brownie base and chill in the refrigerator.

For the topping, heat heavy cream and butter in a saucepan. Pour over chocolate chips, letting them sit for 2 minutes before stirring until smooth.

Pour the chocolate topping over the cream layer and let chill for at least 3 hours before slicing into bars.