Preheat oven to 350°F (175°C). Grease a 9-inch springform pan.
In a medium bowl, mix graham cracker crumbs with melted butter. Press mixture into the bottom of the prepared pan.
In a large bowl, mix cream cheese with sugar until smooth. Blend in milk, then mix in the eggs one at a time, mixing just enough to incorporate.
Mix in sour cream, vanilla, and flour until smooth. Pour filling into the prepared crust.
Bake in the preheated oven for 1 hour. Turn the oven off and let cake cool in oven with the door closed for 5 to 6 hours; this prevents cracking.
Chill in refrigerator until serving.