Preheat oven to 350 degrees F. In a mixing bowl using a hand mixer or in the mixing bowl of a stand mixer, cream together butter and sugar until it’s nice and light.
Mix in eggs one at a time into the creamed butter and sugar. Then add vanilla and continue to mix.
Add in cocoa powder and a pinch of salt. Then add flour and mix until just combined. Try not to overmix the batter at this point.
Scoop batter into a 9×13 baking dish and spread out evenly with a flat spatula. Sprinkle brownies very liberally with chocolate chips.
Bake brownies at 350 degrees for 25-30 minutes until the center is not quite set, but almost. Don’t over-bake them!
Let brownies cool for 15 minutes before slicing into them.
Store leftovers at room temperature in an airtight container.