1.Line a 9 x 9 or 8 x 8 square baking pan with foil then butter foil and Set aside.
2.In a large heavy saucepan over low heat, melt the chocolate morsels, condensed milk, and 2 tbsp butter. Stir until smooth and melted. Remove from the heat and stir in the vanilla extract and pinch of salt. Now gently stir in the popcorn.
3.Pour into prepared pan and smooth mixture evenly. Chill at least 2 hours in fridge.
4.Remove from pan. Peel off the foil and place on a cutting board. Cut into 20 squares and enjoy this rich, luscious, guilt free treat!