Preheat & Prep: Preheat oven to 350°F and grease a 9-inch springform pan.
Make the Crust: Mix crushed graham crackers and melted butter. Press into the pan.
Prepare the Filling: Beat cream cheese and sugar until smooth. Mix in milk, then add eggs one at a time.
Final Mix: Blend in sour cream, flour, and vanilla until smooth.
Bake: Pour filling over crust and bake for 1 hour.
Cool Gradually: Turn oven off and let the cheesecake sit inside for 5-6 hours.
Chill & Serve: Refrigerate until fully set, then slice and enjoy!