Chocolate Crumb Crust (recipe below)
2 c. (12 oz. pkg.) chocolate chips
3 (8 oz.) pkg. cream cheese, softened
1 (14 oz.) can sweetened condensed milk
4 eggs
2 tsp. vanilla extract

Heat oven to 300 degrees. Prepare Chocolate Crumb Crust; set aside.

In heavy saucepan over very low heat, melt chips. In a large bowl, beat cheese until fluffy. Gradually beat in sweetened condensed milk until smooth. Add melted chips and remaining ingredients. Mix well. Pour into prepared pan. Bake 1 hour and 5 minutes or until center is set. (If you are using my oven, you'll never be sure when it is done, it took me about 15 minutes extra.) Cool; chill.

CHOCOLATE CRUMB CRUST:

In a medium bowl, combine 1 1/2 cups vanilla wafer crumbs (I totally guessed on this, since I ripped the recipe), 1/2 cup powdered sugar, 1/3 cup cocoa and 1/3 cup melted butter. Firmly press on bottom of 9-inch springform pan.