1-First, preheat your oven to 350°F and line an 8×8 inch baking pan with parchment paper for easy removal later. In a microwave-safe bowl, melt the butter, oil, granulated sugar, and brown sugar in 30-second intervals, stirring each time until fully melted, then microwave an additional minute and stir vigorously.

2-Next, whisk in the eggs one at a time, then add the vanilla extract until the batter pulls from the sides of the bowl. Fold in the flour, cocoa powder, and salt just until combined to keep the texture smooth and fudgy.

3-Pour half the batter into the prepared pan and spread it evenly, then place the chocolate sandwich cookies over the batter in the center. Cover with the remaining batter, spreading to fully cover the cookies, and sprinkle crushed chocolate sandwich cookies on top for extra crunch.

4-Bake for 30 minutes until done, then cool completely on a wire rack before slicing for clean squares. This method ensures the Oreos stay layered perfectly inside. For more chocolate inspiration, check out chocolate zucchini bread for a healthier twist on baked goods.

5-Layering the Oreos is a fun step that adds surprise to each bite, so take your time to arrange them evenly.