In a large mixing bowl, pour 2 cups of heavy cream. Use an electric mixer to whip on medium speed until soft peaks form, about 1-2 minutes.

Gradually add 1 cup of powdered sugar and 1 teaspoon of peppermint extract, continuing to whip until stiff peaks form.

In a rectangular dish, place a layer of chocolate sandwich cookies at the bottom. Optionally dip them in milk.

Spread a generous layer of whipped cream over the cookies.

Continue layering with cookies and whipped cream until everything is used, finishing with whipped cream on top.

Cover the dish tightly with plastic wrap and refrigerate overnight.

Before serving, garnish with crushed peppermint candies or homemade peppermint candy.

Cut into slices and serve chilled.