01 -
Preheat oven to 350°F. Line an 8x8 inch square baking pan with parchment paper, ensuring the edges overhang for easy removal.
02 -
In a microwave-safe bowl, melt butter, vegetable oil, granulated sugar, and brown sugar together in 30-second intervals, stirring between each interval. Once thoroughly melted, microwave an additional 1 minute. Stir vigorously to ensure the sugar fully dissolves.
03 -
Add cold eggs to the mixture one at a time, whisking well after each addition. Blend in vanilla extract until the batter slightly pulls away from the sides of the bowl.
04 -
Sift in all-purpose flour, cocoa powder, and salt. Gently fold until just combined, avoiding overmixing.
05 -
Evenly spread half the brownie batter into the prepared pan. Arrange 15 Oreo cookies in a single layer across the batter.
06 -
Pour the remaining batter over the Oreos, ensuring they are completely covered and the top is smooth.
07 -
Distribute 5 crushed Oreo cookies over the surface. Bake in the preheated oven for 30 to 45 minutes, or until a toothpick inserted into the center comes out with moist crumbs.
08 -
Transfer the pan to a wire rack and allow the brownies to cool completely. Lift out using the parchment paper and cut into squares for serving.