1 1/2cupchopped peanut butter cupsabout 30 mini cups
Preheat oven to 350 degrees. Line a 9x13 inch pan with foil and spray lightly with cooking spray.
Place butter and chocolate chips in a microwave safe bowl and heat in 30 second intervals stirring in between until melted and smooth.
Stir in cocoa powder until incorporated. Add sugar, brown sugar, vanilla and salt and stir to combine. Stir in eggs one at a time until mixed throughout. Gently stir in flour until incorporated. The batter will be thick. Spread 2/3 of the batter evenly into the bottom of the 9x13 inch pan. Set aside.
To make the hot fudge layer: In a mixing bowl beat together the cream cheese and hot fudge until smooth and creamy. Spread on top of the brownie layer. Spread remaining brownie batter on top. Sprinkle with peanut butter cups.
Bake on the center rack for 30 minutes or until brownies are set and starting to pull away from the edges. Allow to cool completely and refrigerate for 2 hours before cutting into bars.