Line an 8×8 inch square pan with parchment paper, ensuring there’s an overhang for later removal.
In a saucepan, combine sugar, cocoa powder, salt, and condensed milk. Heat and bring the mixture to a boil, then reduce to medium-low heat.
Add butter and chocolate chips to the saucepan, stirring until the mixture becomes smooth and well combined. Don’t forget to stir in the vanilla extract.
Pour the mixture into the prepared pan, spreading it out evenly. If desired, add toppings and gently press them in. Allow the fudge to cool for 2-3 hours at room temperature.
Once the fudge has thoroughly cooled, use the parchment paper overhang to lift it from the pan. Use a sharp knife to cut it into squares, and it’s ready to be enjoyed!