Creating the Best Ever Oreo Brookies can be as easy as pie when you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9×13 inch baking pan or line it with parchment paper for easy removal.
2. Make the Brownie Batter: In a large bowl, melt the butter for the brownie layer. Stir in granulated sugar and brown sugar until fully combined.
3. Add Eggs & Vanilla: Once mixed, add the eggs one at a time and then stir in the vanilla extract until smooth.
4. Combine Dry Ingredients: In a separate bowl, sift together flour, cocoa powder, baking powder, and salt. Gradually add to the wet mixture until just combined.
5. Spread the Brownie Layer: Pour the brownie batter into the prepared pan, spreading it evenly across the bottom.
6. Prepare the Cookie Dough: In a large mixing bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
7. Add Eggs & Vanilla: Mix in the eggs, one at a time, and then the vanilla extract until well incorporated.
8. Combine Dry Ingredients for Cookies: In another bowl, whisk together flour, baking soda, and salt. Gradually add to the butter mixture until just combined.
9. Add Chocolate Chips and Oreos: Fold in the chocolate chips and chopped Oreos into the cookie dough.
10. Layer the Cookie Dough: Drop spoonfuls of cookie dough over the brownie layer in the baking pan, ensuring even coverage.
11. Bake: Place the pan in the preheated oven and bake for 25-30 minutes. The edges should be set, but the center may look a bit soft—this is perfect!
12. Cool Down: Remove from the oven and allow to cool in the pan for 10-15 minutes before transferring to a wire rack.
13. Slice and Serve: Once cooled, slice into squares and enjoy your spectacular creation!

These steps will guide you in preparing an unforgettable batch of the Best Ever Oreo Brookies!