Start by lining a 9x9 inch baking dish with parchment paper, allowing some overhang for easy removal later.
In a medium saucepan, combine the sweetened condensed milk with the white chocolate chips over low heat. Stir continuously until the chocolate is completely melted and the mixture is smooth.
Once the chocolate is melted, remove the saucepan from heat. Stir in a pinch of salt, the McCormick Vanilla Extract, and the McCormick Peppermint Extract.
Gently fold in the chopped chocolate sandwich cookies until they are evenly distributed throughout the fudge mixture.
Pour the fudge mixture into the prepared baking dish, spreading it evenly. If you’re using crushed candy canes for garnish, sprinkle them on top now.
Refrigerate the fudge for at least 2-3 hours, or until it is firm to the touch.
Once the fudge is set, lift it out of the dish using the parchment paper overhang. Use a sharp knife to cut it into squares.