Press mixture into the bottom and 2 inches up the sides of a 9-inch springform pan; chill.
In a big bowl, beat cream cheese until fluffy.
Gradually add milk; beat until smooth.
Add melted chocolate chips, eggs, and vanilla; stir until well blended.
Pour into crust.
Place cheesecake/pan in a large rectangular baking pan filled with 2 inches hot water; place in a 300 degree oven and bake for 1 hour and 15 minutes or until center is almost set.
Remove cheesecake from oven and water-filled pan and cool on a wire rack for 15 minutes.
Carefully run a knife around edge of pan to loosen.