Preheat the oven to 350ºF. Line a 9" square baking dish with parchment paper and set aside.
Combine the "Snickerdoodle Blondie" ingredients in a mixing bowl, and pour into the lined baking dish. Bake at 350ºF for 18 to 20 minutes, or until light brown and almost set. Remove from the oven & allow the dish to cool.
In a blender or food processor, combine the "Cheesecake" ingredients until the mixture is smooth and creamy. Give it a taste & adjust the flavors if you'd like.
Pour the filling over the Blondie layer. Smooth over the top, then sprinkle with the cinnamon-sugar topping.
Place the dish in the freezer to set for at least 3 hours, or until firm. Slice into 16 squares with a hot, dry knife (I wiped mine off between each slice).
Serve the bars frozen or thawed for 5-10 minutes. Store in the freezer.