Preheat the oven to 350°F. Grease an 8x8-inch baking dish.
In a medium bowl, combine almond flour, granulated erythritol, cinnamon, and salt. Stir in the melted butter until the mixture is crumbly and well combined. Press the mixture evenly into the bottom of the prepared baking dish to form the crust.
In a large mixing bowl, beat the softened cream cheese with the powdered erythritol and vanilla extract until smooth and creamy. Add the eggs one at a time, mixing well after each addition. Stir in the baking powder until fully incorporated.
Pour the cheesecake mixture over the crust in the baking dish and spread it evenly.
Bake for 25-30 minutes or until the center is set and slightly firm to the touch. Remove from the oven and let cool at room temperature for about 30 minutes, then refrigerate for at least 2 hours to set completely.
Before serving, sprinkle the top with cinnamon sugar for a churro-like finish. Cut into bars and enjoy!