While the crust is baking mix together the cheesecake filling.
MIX CREAM CHEESE, SUGAR, FLOUR, & VANILLA – mix together cream cheese, sugar, flour, and vanilla in a large bowl until the mixture is smooth.
ADD EGGS – add in 1 egg at a time until the egg is incorporated into the mixture
ADD SOUR CREAM – add sour cream and gently mix just until its blended
ADD OREOS – break the Oreos into quarters and gently fold the cookie pieces into the cheesecake filling with a spatula.
POUR OVER CRUST – pour the cheesecake filling over the baked crust
ASSEMBLE WATER BATH – wrap the bottom and sides of the spring form pan in foil so no water gets into the cheesecake. Place the wrapped cheesecake pan in a sheet pan and set in the oven. Add about 1 inch of hot water to the sheet pan.
BAKE – bake at 350°F for 1 hour or until the center is almost set, if the center is slightly wobbly that’s fine. Set the cooked cheesecake on cooling rack. **Important – leave the spring form pan together, do not release the sides.