Reduce oven temperature to 325°F.
In a blender, combine cream cheese, sugar, and vanilla and blend until smooth.
Add sour cream and blend once more. Add eggs, one at a time, blending in between until smooth.
Set aside.
MAKE THE CINNAMON SWIRL:
In a medium bowl, stir together the melted butter, brown sugar, cinnamon, and flour until smooth.
TO ASSEMBLE:
Pour half of the cheesecake filling over the cooled crust. Dot with cinnamon mixture, then swirl together gently with a knife.
Add remaining filling and remaining cinnamon mixture, then swirl once more.
Bake until center is mostly set, 35-40 minutes.
Chill until firm, 2 hours. Slice, serve, and enjoy!
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