Preheat the oven to 350-degrees and grease a 9" x 13" baking dish.
Add the butter, sugar, and vanilla extract to the bowl and mix until creamy.
Next, add the eggs and mix.
Add the flour, unsweetened cocoa, and salt, and mix. The batter will be very thick.
Take 10 of the Oreos and break each of them into four pieces. (Save the other 10 Oreos).
Add the Oreos and the chocolate chips and stir until combined.
Pour the batter into the baking dish and spread it out.
Take the rest of the Oreos and break them up into pieces and top the brownies.
Bake for 35 to 40 minutes.