Step 1

Bake brownies according to package. Let cool and then cut into small squares.

Step 2

While brownies are baking, whisk together pudding mix and milk until creamy. Cover and refrigerate for 2 hours.

Step 3

After pudding has chilled, fold in 8 ounces of the Cool Whip. Stir to combine.

Step 4

In a trifle dish, layer half of the brownies, then half of the pudding mixture, and then half of the crushed Oreos. Repeat the layers. Cover and store in refrigerator until ready to serve.