Creamiset Crockpot Fudge

In a crockpot place:
1 lb. semisweet chocolate, finely chopped
3 T butter, cut into chunks
Place the crockpot on Low for 1 hour. Stir and pour in 1 can of sweetened condensed milk. Stir. Pour the mixture into a prepared 8"X8" pan. ( In an 8"X8" pan spray with cooking spay, add parchment so there is  2 " hanging from all sides)
Place into the refrigerator and allow to harden for 4 hours.