01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together flour, baking soda, and salt in a medium bowl. Set aside.
03 - Beat butter and cream cheese together in a large bowl until smooth and creamy, approximately 2 minutes.
04 - Add granulated sugar and brown sugar. Beat until light and fluffy.
05 - Mix in egg, vanilla extract, lemon zest, and lemon juice until fully combined.
06 - Gradually add dry ingredients to wet mixture, mixing on low speed just until incorporated.
07 - Gently fold blueberries into dough with a spatula, taking care not to crush the berries.
08 - Drop dough onto prepared baking sheets using a cookie scoop or tablespoon, spacing about 2 inches apart.
09 - Bake for 11-13 minutes until edges are lightly golden and centers appear set.
10 - Let cookies rest on baking sheets for 5 minutes, then transfer to wire rack to cool completely.