Pre heat oven to 350 and line a 8X8 inch brownie pan with parchment paper.
In a small pot, melt butter and allow for it to start to bubble. Once it is bubbling, remove from heat and pour into a large bowl. Immediately add in sugar, olive oil, and vanilla. Using a hand mixer or stand mixer, mix on high for 2 minutes.
Next up crack in the eggs and mix for two minutes or until the mixture is pale and creamy.
Add in the flour, cocoa powder, chocolate chips, and salt. Using a spatula, mix everything together just until all ingredients are incorporated. Do not over mix. Pour batter into prepared brownie pan and place in the oven for 25-28 minutes. You want the centre to be still very slightly jiggly when you take out of the oven.
After cooking, remove from oven and allow brownies to fully cool.
Enjoy these INSANE brownies with a glass of milk!