01 - Line an 8-inch square baking pan with parchment paper, leaving an overhang on two sides for easy removal.
02 - In a small saucepan, combine the diced strawberries, granulated sugar, and lemon juice. Simmer over medium heat for 5 to 7 minutes, stirring frequently, until the berries break down and the mixture thickens to a jam-like consistency. Set aside and let cool completely.
03 - Place the chopped white chocolate, sweetened condensed milk, and butter in a microwave-safe bowl. Heat in 30-second intervals, stirring thoroughly between each interval, until the mixture is completely melted and smooth.
04 - Stir the vanilla extract into the melted fudge base until evenly incorporated.
05 - Transfer the fudge mixture into the prepared baking pan, spreading it into an even layer with a spatula.
06 - In a small bowl, beat together the softened cream cheese, powdered sugar, and heavy cream using a whisk or hand mixer until smooth and creamy.
07 - Drop small spoonfuls of the cooled strawberry compote and cream cheese mixture over the fudge surface. Use a toothpick or knife to gently swirl the two mixtures through the fudge base, creating a marbled pattern. Be careful not to overmix.
08 - Refrigerate the fudge for at least 2 hours, or until it is firm and fully set.
09 - Lift the fudge slab out of the pan using the parchment paper overhang. Cut into 16 even squares and serve chilled.