Preheat your oven to 350°F (175°C) and prepare a 9x13-inch pan by greasing it or lining it with parchment paper.

In a large mixing bowl, combine melted unsalted butter, light brown sugar, and granulated sugar. Whisk until smooth, then add eggs and vanilla extract, and mix until creamy.

In a separate bowl, whisk together all-purpose flour, salt, and baking soda. Gradually mix the dry ingredients into the wet mixture until just combined.

Fold in the semi-sweet chocolate chips evenly throughout the dough.

Transfer the cookie dough into your prepared pan, pressing it down evenly and smoothing the surface.

Bake in the preheated oven for about 28-32 minutes, or until the edges are golden brown and a toothpick inserted comes out clean.

Allow the bars to cool in the pan for at least 20 minutes before slicing into squares.