Crush 20 Golden Oreos in a food processor until they form fine crumbs. Melt 4 tablespoons of unsalted butter in a saucepan and combine with the crumbs. Press into an ungreased 8x8-inch baking dish.

Combine the instant banana pudding mix with 1.5 cups of cold milk in a mixing bowl. Whisk for about 2 minutes until smooth and thickened.

Mash one ripe banana until smooth. In another bowl, beat cream cheese, 1 cup of confectioners' sugar, and 1 teaspoon of vanilla extract until fluffy. Fold in 1 cup of Cool Whip.

Layer sliced bananas over the chilled crust. Spread the cream cheese mixture on top, followed by the banana pudding.

Cover the dish and refrigerate for at least 2 hours. Sprinkle crushed Oreos on top before serving.