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 thoroughly combined.
04 - Gradually blend dry ingredients into wet mixture until just incorporated. Avoid overmixing.
05 - Gently fold blueberries into the dough. Refrigerate for 30 minutes for easier handling (optional but recommended).
06 - Combine cream cheese and powdered sugar in a small bowl until smooth and creamy.
07 - Set oven to 350°F. Line two baking sheets with parchment paper.
08 - Scoop 2 tablespoons of dough, flatten slightly, place 1 teaspoon cheesecake filling in center, and fold dough around to seal completely.
09 - Place filled cookies on prepared baking sheets, spacing 2 inches apart.
10 - Bake for 11-13 minutes until edges begin to lightly brown. Avoid overbaking for optimal chewiness.
11 - Let cookies rest on baking sheets for 5 minutes, then transfer to wire rack to cool completely.