Step 2: Line your baking sheets with parchment paper.
Step 3: In a medium bowl, whisk together the all-purpose flour, baking soda, baking powder, and salt until well combined. Set aside.
Step 4: In a large mixing bowl, cream together the softened unsalted butter, granulated sugar, and light brown sugar until light and fluffy.
Step 5: Add in the lemon zest, egg, and vanilla extract. Mix until well combined.
Step 6: Gradually add the dry ingredients to the wet mixture, mixing just until combined.
Step 7: Gently fold in the fresh blueberries.
Step 8: Using a cookie scoop, drop rounded balls of dough onto the prepared baking sheets, spacing them about 2 inches apart. Bake for 10 to 12 minutes.
Step 9: Let the cookies cool on the baking sheet for about 5 minutes before transferring them to a wire rack to cool completely.
Notes
Store leftover cookies in an airtight container at room temperature for up to three days, or freeze for up to three months.