Preheat oven to 350 and line two 8x8 pans with parchment paper and spray with Pam baking spray.
In a medium bowl, whisk together the flour, cocoa powder, and salt.
Using a large bowl, beat together the melted butter and sugar until combined.
Beat in the eggs and vanilla until combined.
Gradually beat in the dry ingredients until combined.
Fold in the chocolate chips.
Divide the batter between the two pans and spread evenly.
Bake in the oven for 30-40 minutes or until a toothpick comes out clean.
Allow to cool completely on the counter.