Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a medium bowl, whisk together the flour, baking soda, and salt. Set aside.
In a separate large bowl, beat the softened butter, granulated sugar, and brown sugar until light and fluffy.
Add the egg and mix until fully incorporated.
Gradually add the dry ingredients to the wet ingredients, mixing just until combined.
Scoop the dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 10-12 minutes, or until the edges turn golden brown.
Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.
