Step 1: Preheat your oven to 325°F (163°C).
Step 2: In a mixing bowl, combine 8 ounces of crushed Nilla Wafer cookies with 6 tablespoons of melted unsalted butter. Press into a greased 9-inch springform pan and bake for 10 minutes. Let cool.
Step 3: In a large mixing bowl, beat 32 ounces of cream cheese with 1 cup of sugar until smooth. Mix in 3 tablespoons of flour.
Step 4: Add 4 eggs one at a time, mixing on low speed after each addition.
Step 5: Mix in 2 teaspoons of vanilla, 1 cup of mashed bananas, 2 cups of sour cream, and 2 teaspoons of salt until well combined.
Step 6: Pour the filling over the cooled crust and smooth the top.
Step 7: Bake for 60-70 minutes until edges are set and center is slightly jiggly. Let cool in the oven with the door cracked for 1 hour.
Step 8: Chill in the refrigerator for at least 4 hours before serving.
