Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a bowl, whisk together the flour, baking soda, and salt. Set aside.
In a separate large mixing bowl, cream the butter, brown sugar, and white sugar until smooth.
Add the egg and vanilla extract, mixing until fully combined.
Gradually add the dry ingredients to the wet ingredients, stirring until a dough forms.
Fold in the chocolate chunks evenly throughout the dough.
Cover the dough and refrigerate for at least 30 minutes to enhance flavor and texture.
Scoop the dough onto the prepared baking sheet, spacing cookies about 2 inches apart.
Bake for 10-12 minutes or until the edges are golden brown but the centers remain soft.
Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack.