Preheat oven to 350 ℉ and line a baking sheet with parchment paper, wax paper, or a silicone baking mat.
In a medium bowl gently mix or whisk together the melted butter, brown and granulated sugar, salt, and vanilla.
Using a spatula or whisk, mix in the flour until just combined.
Gently fold in the chocolate chips.
Add the cookie dough to the prepared baking sheet.
Add another piece of parchment paper or wax paper, and using the bottom of a cup or your hands, press down until the dough is an even 1/4 to 1/2 inch layer,
Remove the top layer of the parchment paper and gently press in the cookie dough to make sure the edges are an even thickness, otherwise they’ll burn.
Bake in the middle rack of a 350 ℉ preheated oven for 12-16 minutes, until the edges are slightly brown and the middle has firmed up.
Rotate the baking sheet halfway through to ensure even baking.
Remove from oven and let cool completely before breaking apart or adding chocolate.