Spray the 9 x 13 baking dish with cooking spay and cover it with wax paper.

Using a small pot, combine condensed milk and peppermint extract

In medium-sized mixing bowl, add the chocolate chips and set aside

Once the milk has started to steam and simmer, pour over the chocolate chips

Whisk the milk and chocolate chips together until smooth

Pour chocolate mixture into prepared baking dish.

Sprinkle the mint cookie bark and peppermint bark onto the top of the fudge.

Allow to cool overnight on the counter before cutting into squares.