In a food processor, process the vanilla wafers until fine crumbs form. In a large bowl, cream butter until light and fluffy. Add crumbs; mix well. Press onto the bottom of a greased 9-in. springform pan.
In another large bowl, combine the creme de menthe, peppermint extract and food coloring if desired. Gradually beat in confectioners' sugar until blended. Spread over crust.
In a small saucepan, melt the chocolate chips and butter with 1 tablespoon of water over low heat, stirring until smooth. Spread over the filling. Chill for 1 hour.
In a small bowl, beat cream until soft peaks form. Spread over the top of cake. Chill for 4 hours or overnight. Garnish with chocolate curls and mint leaves if desired.
Interesting Facts
Creme de Menthe is a sweet, mint-flavored liqueur that is used in many cocktails such as the Grasshopper.
This cake is delicious served cold, but can also be served at room temperature.
This cake can be stored in the refrigerator for up to 3 days.