Start by crushing approximately 20 Oreo cookies in a food processor until they resemble sandy crumbs. In a bowl, mix the crumbs with 4 tablespoons of melted butter until well combined. Press this mixture firmly into the bottom of a 9x13-inch dish, creating an even layer. Chill the crust in the refrigerator for at least 15 minutes while you prepare the next layer.

In a mixing bowl, beat 8 ounces of softened cream cheese and 1 cup of powdered sugar together using a hand mixer until smooth and creamy. Then, mix in 1 cup of peanut butter until fully incorporated. Finally, fold in half of the whipped topping gently, creating a light and airy texture. Spread this luscious peanut butter layer evenly over your chilled crust.

In a separate bowl, whisk together 1 package of chocolate pudding mix and 2 cups of cold milk. Stir vigorously for about 2 minutes until the mixture thickens to a pudding-like consistency. Carefully pour and spread the chocolate pudding over the peanut butter layer, smoothing it out with a spatula for an even finish.

Take the remaining whipped topping and spread it over the chocolate pudding layer. Use a spatula to create a smooth, even layer, reaching every corner.

For the finishing touch, sprinkle crushed peanut butter cups over the top and drizzle with melted peanut butter if desired.

Cover the dish with plastic wrap and refrigerate for a minimum of 4 hours, allowing the flavors to meld and the layers to set.