01 - Preheat oven to 350°F. Line two baking sheets with parchment paper and set aside.
02 - In a large mixing bowl, beat the softened butter and granulated sugar together using an electric mixer on medium speed until the mixture turns pale and becomes light and fluffy, about 2 to 3 minutes.
03 - Add the egg, lemon juice, lemon zest, and vanilla extract to the butter mixture. Continue beating on medium speed until everything is well combined and smooth.
04 - In a separate medium bowl, whisk together the all-purpose flour, baking soda, and salt until evenly distributed.
05 - Gradually add the dry ingredient mixture into the wet ingredients, mixing on low speed just until the flour is fully incorporated. Be careful not to overmix, as this can make the cookies tough.
06 - Scoop heaping tablespoons of dough and roll into balls using your hands. If desired, roll each dough ball in powdered sugar to coat evenly before placing on the baking sheet.
07 - Place the dough balls on the prepared baking sheets, spacing them about 2 inches apart to allow for spreading during baking.
08 - Bake for 9 to 11 minutes, or until the edges are just barely set and the centers still appear slightly soft and underbaked. This ensures a chewy, soft texture.
09 - Allow the cookies to rest on the baking sheets for 5 minutes, then carefully transfer them to a wire cooling rack to cool completely before serving or storing.