Line a 9x13-inch baking dish with parchment paper. Clear some space in your fridge or freezer for the fudge.
Melt all ingredients (except the salt) in a bain-marie over medium heat. You can watch this bain-marie tutorial here. Stir continuously until the fudge is completely melted.
Pour the mixture into the prepared dish and smooth out with a spatula or the back of a spoon. Sprinkle the salt evenly over the fudge.
Place in the fridge for 1-2 hours or in the freezer for 30-40 minutes, or until solid.
Cut with a sharp knife into 30 squares or desired size. Enjoy!