Prepare the Fudge

1. Line the Pan: Line an 8×8-inch baking dish with parchment paper, leaving some overhang for easy removal.
2. Melt the Chocolate: In a medium saucepan, combine the sweetened condensed milk, chocolate chips, cocoa powder, and salt. Heat over low-medium heat, stirring constantly, until smooth and melted.
3. Add the Extras: Stir in the vanilla extract and 1/2 cup of mini marshmallows until evenly distributed.

Assemble and Chill

1. Pour into Pan: Pour the chocolate mixture into the prepared pan, spreading it evenly with a spatula.
2. Decorate: Sprinkle additional mini marshmallows on top, pressing them gently into the fudge. For extra flair, add crushed peppermint or a drizzle of chocolate syrup.
3. Chill: Refrigerate for at least 2 hours, or until firm.

Cut and Serve

1. Slice: Lift the fudge out of the pan using the parchment paper. Cut into squares using a sharp knife.
2. Serve: Arrange on a platter or serve individually with whipped cream or hot chocolate on the side.