In a medium bowl, combine crushed cookies and melted butter. Press the mixture firmly into the bottom of a 9-inch springform pan. Chill for 30 minutes.
In a large mixing bowl, beat the cream cheese and sugar until smooth and creamy.
Add sour cream, peppermint extract, and food coloring if using. Mix until well combined.
In a separate bowl, whip the heavy cream until stiff peaks form. Gently fold into the cream cheese mixture.
Divide the mixture in half. Fold the melted chocolate into one half to create the chocolate layer.
Spread the chocolate layer over the crust, followed by the mint layer.
Refrigerate the cheesecake for at least 6 hours, or overnight, until set.
Before serving, top with whipped cream and crushed cookies if desired.