01 - Whisk together flour, baking soda, and salt in a medium bowl. Set aside for later use.
02 - Beat softened butter, granulated sugar, and brown sugar in a large mixing bowl until light and fluffy, approximately 2-3 minutes.
03 - Mix in egg, vanilla extract, lemon zest, and lemon juice until fully incorporated and smooth.
04 - Gradually fold in dry ingredients until just combined, being careful not to overmix.
05 - Gently fold blueberries into the dough. Refrigerate for at least 30 minutes to prevent excessive spreading during baking.
06 - Blend cream cheese and powdered sugar in a small bowl until completely smooth and creamy.
07 - Preheat oven to 350°F. Line two baking sheets with parchment paper and set aside.
08 - Scoop approximately 2 tablespoons of dough, flatten in palm, place 1 teaspoon cheesecake filling in center, and carefully fold edges around to seal completely.
09 - Place filled cookies on prepared baking sheets, spacing about 2 inches apart to allow for spreading.
10 - Bake for 11-13 minutes until edges just begin to turn golden brown. Remove promptly to prevent overbaking.
11 - Let cookies rest on baking sheets for 5 minutes, then transfer to wire rack to finish cooling.