01 - Whisk together flour, baking soda, and salt in a medium bowl. Set aside for later use.
02 - Beat 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 into the butter mixture.
04 - Gradually blend dry ingredients into wet mixture until just combined. Avoid overmixing to prevent tough cookies.
05 - Gently fold blueberries into the dough. Refrigerate for 30 minutes for easier handling and better flavor development.
06 - Whisk cream cheese and powdered sugar in a small bowl until completely smooth and no lumps remain.
07 - Heat oven to 350°F. Line two baking sheets with parchment paper to prevent sticking.
08 - Scoop approximately 2 tablespoons dough, flatten slightly, place 1 teaspoon cheesecake filling in center, and seal dough around filling completely.
09 - Place filled cookies on prepared baking sheets 2 inches apart. Bake for 11-13 minutes until edges barely begin to turn golden.
10 - Let cookies rest on baking sheets for 5 minutes, then transfer to wire rack to cool entirely before serving.