Preheat oven to 350°F (175°C). Preheat oven to 350°F (175°C)Line 9x13" pan with parchment.
Line a 9x13 inch baking pan with parchment paper
Melt butter in a large microwave-safe bowl
Whisk in sugar until combined
Beat in eggs one at a time, then stir in vanilla extract
Add cocoa powder and whisk until smooth
Fold in flour and salt until just combined
Gently stir in chocolate chips
Pour batter into prepared pan and spread evenly
Bake for 30-35 minutes, or until a toothpick comes out with moist crumbs
Let brownies cool completely before cutting