Step 1: Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

Step 2: In a large mixing bowl, cream together the butter and sugar until light and fluffy.

Step 3: Add the lemon zest and lemon juice to the butter mixture, beating until well combined.

Step 4: Mix in the eggs one at a time, ensuring each is fully incorporated before adding the next.

Step 5: In a separate bowl, whisk together the flour, baking powder, and salt.

Step 6: Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Step 7: Gently fold in the blueberries, being careful not to crush them.

Step 8: Drop spoonfuls of dough onto the prepared baking sheet, spacing them about 2 inches apart.

Step 9: Bake in the preheated oven for 10-12 minutes or until the edges are lightly golden.

Step 10: Allow cookies to cool on the baking sheet for a few minutes before transferring to a wire rack.