01 - 
                Line a 9x9-inch pan with aluminum foil for easy removal and coat with non-stick cooking spray.
              
              
              
                02 - 
                Add whole Oreo cookies to a food processor and process on high until finely ground.
              
              
              
                03 - 
                In a small microwave-safe bowl, combine melted unsalted butter and 1 tablespoon dark chocolate. Microwave until fully melted and stir until smooth.
              
              
              
                04 - 
                Pour the melted butter and chocolate mixture into the food processor with Oreo crumbs. Process until fully blended. Press the mixture firmly and evenly into the prepared pan to create a uniform base. Set aside.
              
              
              
                05 - 
                In a large bowl, beat softened cream cheese with an electric mixer on high speed until light and fluffy.
              
              
              
                06 - 
                In a separate microwave-safe bowl, combine chopped dark chocolate and heavy whipping cream. Heat in 30-second intervals, stirring between each, until chocolate is melted and mixture is silky and smooth, about 90 seconds total.
              
              
              
                07 - 
                Pour the warm chocolate and cream mixture into the bowl with whipped cream cheese. Beat on high speed until thoroughly mixed and smooth.
              
              
              
                08 - 
                Add Baileys Irish Cream or Kahlua and salt to taste, if using. Mix until evenly incorporated.
              
              
              
                09 - 
                Evenly spread the chocolate cream cheese mixture over the Oreo crust.
              
              
              
                10 - 
                Evenly distribute mini semi-sweet chocolate chips over the surface.
              
              
              
                11 - 
                Refrigerate uncovered for at least 3 hours until firm. Once well chilled, cover with foil and store refrigerated until serving.
              
              
              
                12 - 
                After chilling, cut into bars and serve cold.