Preheat your oven to 350°F (175°C) and line your baking sheets with parchment paper.

Partially melt your softened unsalted butter in a microwave-safe bowl for 20-30 seconds and let cool slightly.

Combine the cooled, melted butter with granulated sugar and light brown sugar in a mixing bowl. Beat until light and fluffy (2-3 minutes).

Add in the large egg and vanilla extract, mixing on low speed until fully combined.

Whisk together flour, baking soda, and salt in a separate bowl. Gradually add to the wet ingredients until just combined.

Fold in chocolate chips until they are evenly distributed throughout the dough.

Drop rounded tablespoons of dough onto prepared baking sheets, spacing them 2-3 inches apart.

Bake for 10-12 minutes for large cookies or 8-9 minutes for medium-sized cookies until edges are golden and centers are soft.

Let the cookies cool on the baking sheets for about 5 minutes before transferring them to a wire rack.