Store: Place the baked blueberry cookies in an airtight container. Store at room temperature or in the fridge for up to 5 days.
Frozen Blueberries: If using frozen blueberries, I recommend using wild blueberries as they are smaller which is better for these lemon blueberry cookies. Mix them in right before scooping the cookies onto the baking sheet. Be careful not to overmix. When using frozen blueberries, I recommend reducing the baking temperature to 350 F (177 C) and baking the cookies for 14 - 16 minutes or until the edges are set, with a golden brown color.