Creamy Lemon Cheesecake Bars Sunshine in Every Bite

Instructions:

1. Preheat oven to 350°F (175°C). Line the 9x9-inch baking pan with parchment paper, leaving an overhang.
2. In a medium bowl, whisk together flour, sugar, salt, and lemon zest (if using). Cut in the cold butter until the mixture resembles coarse crumbs.
3. Press two-thirds of the crumb mixture firmly into the bottom of the prepared pan to form a compact crust.
4. Bake the crust for 10 minutes. Remove from the oven and set aside (keep the oven on!).
5. In a mixing bowl, beat the softened cream cheese and sugar until smooth and creamy. Add the egg, lemon juice, lemon zest, flour, and vanilla extract. Mix until just combined.
6. Pour the lemon cheesecake filling over the partially baked crust and spread it evenly. Sprinkle the remaining crumb mixture evenly over the top of the filling.
7. Bake for 25-30 minutes, or until the topping is lightly golden brown and the center is just set.
8. Let the bars cool completely at room temperature. Then, refrigerate for at least 2 hours before slicing into bars.