In a microwave-safe bowl, combine the semi-sweet chocolate chips and the sweetened condensed milk.
Heat the mixture in the microwave using short intervals, stirring in between each one, until the chocolate chips are completely melted and the mixture is smooth.
Once the chocolate and condensed milk are well combined, stir in the vanilla extract to enhance the fudge's rich flavor.
Line a square baking dish with parchment paper or lightly grease it to prevent sticking.
Pour the smooth chocolate mixture into the prepared baking dish, spreading it evenly with a spatula.
Allow the fudge to cool at room temperature for a while, then refrigerate it until it becomes firm and set.
Once the fudge has solidified, remove it from the baking dish and place it on a cutting board.
Cut the fudge into bite-sized pieces or your desired shapes using a sharp knife.
Serve and enjoy this luscious chocolate fudge as a delectable treat or gift it to your loved ones.