Preheat your oven to 350°F (175°C). Gather all your tools: mixing bowls, measuring cups and spoons, a whisk, a spatula, and parchment paper.

In a medium bowl, combine all-purpose flour, baking soda, and salt. Whisk together until well blended.

In a large bowl, mix melted unsalted butter, brown sugar, and granulated sugar until smooth and creamy.

Stir in vanilla extract, followed by beating in the egg and egg yolk until glossy.

Gradually add the dry ingredients to the wet mixture, stirring gently until combined.

Fold in chocolate chips evenly throughout the dough.

Drop rounded balls of dough onto a parchment-lined baking sheet, leaving 2 inches of space between each.

Bake for 10–12 minutes until the edges are golden and the centers are slightly soft.

Let the cookies cool on the pan for 5 minutes before transferring to a wire rack.