Place 2 inches of water in saucepan and heat to a simmer.
Cut the parchment paper to fit your pan.
Place bowl on the saucepan.
Melt chocolate and milk, stir.
add butter, salt, and vanilla, stir until butter is melted.
Keep mixing until the mixture becomes thick and shiny.
Scrap mixture into prepared pan, place in the refrigerator for minimum of 1 hour to set.
Remove fudge from pan onto a cutting board and cut into squares.
Notes
Let the fudge set for a minimum of 1 hour before cutting. If it is still too soft, let sit for another hour.
Store any of the following ways: airtight container in the refrigerator up to 3 weeks, an airtight container at room temperature, or wrap tightly and freeze.