2 ⅔cupssemi-sweet or bittersweet chocolate chips
114 oz. cansweetened condensed milk
Spray or butter a 8" square baking pan. Line with parchment paper. Set aside.
In a double boiler or metal bowl set over simmering water (make sure the bowl isn't touching the water), combine all of the ingredients. Stir often and the mixture is just melted. Remove from the heat.
Place chocolate mixture in 8" baking sheet. Refrigerate until set, about 4 hours. Lift fudge out of baking pan. Using a sharp knife, cut edges off if some are jagged (just to make all sides smooth), and cut the rest of the fudge into squares.