Creating Easter Dirt Cake Casserole is simple if you follow these steps:

1. Prepare the Oreo Crust: Crush the Oreo cookies in a food processor or by placing them in a plastic bag and crushing them with a rolling pin. Reserve about 1 cup for topping.
2. Combine with Butter: In a bowl, mix the crushed Oreos with melted butter until well combined.
3. Press into Dish: Press the Oreo mixture firmly into the bottom of a 9×13 inch baking dish to form the crust.
4. Mix Cream Cheese Layer: In a separate bowl, beat the softened cream cheese and powdered sugar until smooth.
5. Add Whipped Topping: Fold in 1 cup of whipped topping into the cream cheese mixture until combined.
6. Spread on Crust: Spread the cream cheese mixture evenly over the Oreo crust layer.
7. Prepare Vanilla Pudding: In another bowl, whisk together the instant vanilla pudding mix and 1 cup of milk until thickened. Spread this layer over the cream cheese layer.
8. Prepare Chocolate Pudding: In a separate bowl, whisk the instant chocolate pudding mix with 1 cup of milk until thickened. Spread this layer over the vanilla pudding layer.
9. Top with Whipped Topping: Spread the remaining whipped topping over the chocolate pudding layer.
10. Add Crushed Oreos: Sprinkle the reserved crushed Oreos on top of the whipped topping.
11. Chill: Cover the dish and refrigerate for at least 2 hours to allow it to set properly.
12. Decorate: Before serving, add the edible decorations such as gummy worms or candy flowers for a festive touch.

These steps will guide you in creating this amazing Easter Dirt Cake Casserole with ease.