In the mixing bowl of a stand mixer, place the Brownie mix, eggs, oil, and milk, and blend on medium with the whisk attachment until all the ingredients are mixed smooth.
Place Parchment paper in the bottom of a 9X9 inch pan, and pour the Brownie mix in the pan.
Place Oreo cookies on top of the Brownie batter, until the top is covered in cookies.
Place the pan in the oven at 350 degrees for 25 - 30 minutes.
Remove the pan, and allow it to cool completely.
While the Brownies are cooling, place the White, or Vanilla Frosting in a bowl, and remove the orange middle of about 10 Oreo cookies, and add to the Vanilla frosting Add 1 teaspoon of Orange food coloring gel, and mix well.
Add more food coloring gel if the desired Orange color is not bright enough until the desired color is achieved.
When Brownies are cool, ice with the Orange frosting, and place the Brownies in the refrigerator for 30 minutes.
Remove the Brownies from the refrigerator and frost with the chocolate frosting, and crumble the Remainder of the Oreo cookies on top of the Brownies.
Cut Brownies into 3 X 2-inch squares, and serve immediately. Enjoy!
NOTE: For more cake-like Brownies; add 3 eggs instead of 2 when making the brownies. Brownies will keep, covered, in the refrigerator for up to 5 days. You can also serve with Ice cream or Whipped cream.