- For the crust: mix melted butter with chocolate wafer crumbs and pat into the bottom and up the sides of a well-greased 9-inch pie dish. Set aside.NOTE: Be sure your pie dish is very, very well greased. I usually grease the inside of the entire pie dish with butter and then spray it with PAM to make it easier to sliced and serve. 
- In a large mixing bowl, beat cream cheese and sugar with an electric beater until soft and creamy. Add eggs and beat until well-integrated. 
- Stir whipping cream into melted chocolate and stir into cream cheese mixture. Fold in yogurt and then add all remaining ingredients: salt, coffee, Kahlua, and vanilla extract. Mix until smooth. 
- Pour custard into prepared crust and bake at 350⁰ for 35-40 minutes or until the top is still a little bit jiggly, but not runny. The custard will firm up as it chills.  Refrigerate for several hours (or several days)! 
- When ready to serve, garnish with Kahlua whipped cream and chocolate shavings.Enjoy!