Hot Fudge Sauce

This is the easiest and best hot fudge ever!!  I put it in the crock pot and kept it warm for a ice cream party we had.  It only has 3 ingredients & they're all things that are easy to keep on hand.
here's the recipe:

1 can sweetened condensed milk
1 huge Hershey's bar (or you can use chocolate chips)
1 cube butter

mix all together & you will have the creamiest fudge ever!  The cool thing is you can make it dark chocolate, white chocolate, peppermint, milk chocolate, semi-sweet, and as rich or mild as you like depending on the type of chocolate bar or chocolate chips you use.