Preheat your oven to 350°F (175°C). Line an 8x8 inch baking pan with parchment paper, leaving some overhang for easy removal later.
In a medium bowl, whisk together flour, baking powder, and salt. Set aside.
In a large mixing bowl, beat softened butter and 3/4 cup of granulated sugar with an electric mixer until light and fluffy, about 3-4 minutes.
Add in the egg and vanilla extract, and mix until combined.
Gradually add the dry ingredients to the wet mixture, mixing until just combined.
Press about two-thirds of the dough evenly into the bottom of the prepared baking pan to form a crust.
In another bowl, beat together the cream cheese and remaining 1/4 cup sugar until smooth. Then, mix in the sour cream until well blended.
Spread the cream cheese mixture evenly over the crust in the baking pan.
Crumble the remaining dough on top of the cream cheese layer, ensuring it’s evenly distributed.
In a small bowl, mix together the cinnamon and the 2 tablespoons of sugar. Sprinkle this mixture over the crumbled dough.
Bake for 35-40 minutes or until the top is golden brown and the cheesecake is set in the center.
Allow the bars to cool in the pan for about 30 minutes, then lift them out using the parchment overhang. Let them chill in the refrigerator for at least 2 hours to set completely.
Once chilled, cut into squares and serve.
Notes
Serve the bars on a decorative platter, dusted with powdered sugar and drizzled with caramel sauce for an extra indulgent touch.