Spray an 8 inch pan with non-stick spray. Then line it with parchment paper. It will make the fudge easier to lift out.
In a medium size saucepan combine the chocolate chips and sweetened condensed milk. Cook over low heat, stir consistently until the mixture is completely melted and smooth.
Pour the mixture into prepared pan, spread it out evenly. If you spray the back of a tablespoon with no-stick spray it will make it way easier to smooth out. Toss the crushed peppermints over top.
Pop the pan in the fridge for about 2 hours minimum. You can also let it set up overnight so it becomes quite firm.