For the Brownies

1. Preheat the oven to 350°. Grease a 9 x 9 inch baking pan with cooking spray or a bit of canola/vegetable oil.
2. In a large microwaveable bowl, heat the butter on high until fully melted. Remove from the microwave. Stir in sugar and chocolate chips until smooth and silky. The heat of the butter will melt everything together.
3. Allow the butter mixture to cool slightly and come back to room temp.
4. When ready, add eggs, then the vanilla extract to the butter/sugar/chocolate mixture and stir well.
5. In a separate bowl, whisk together the cocoa powder(s), flour and salt.
6. Add the dry ingredients to the butter/sugar/chocolate chip mixture and gently fold & stir together until there are just a few small clumps in the batter. Do not over mix. The batter will be thick.
7. Pour the batter into the prepared baking pan and bake for about 35-40 minutes. The top should have large cracks and if you insert a knife into the middle, it should be just about clean.
8. Allow the brownies to cool completely.

To Make the Oreo Frosting

1. Using a hand mixer, mix the butter and shortening until light and fluffy in a large bowl.
2. Add the powdered sugar, 1 cup at a time, mixing slowly in between each addition until most of the sugar is mixed (the mixture may still be dry at this point).
3. Add the vanilla extract and 1 tablespoon of milk. Mix on medium speed. Add more milk slowly, enough for a frosting to come together. Mix on high speed until super light and fluffy. The frosting should be soft and light.
4. Lastly, stir in the crushed Oreos by hand.
5. Frost the brownies generously. Serve.