01 -
In a large bowl, whisk together the pudding mix and cold milk until smooth and thickened. Gently fold in the whipped topping until well combined.
02 -
In a 9×13-inch baking dish, arrange a single layer of graham crackers on the bottom. Spread half of the pudding mixture evenly over the crackers. Add another layer of graham crackers, then top with the remaining pudding mixture. Finish with a final layer of graham crackers.
03 -
In a medium bowl, whisk together cocoa powder and powdered sugar. Add melted butter, milk, and vanilla extract, and mix until smooth and spreadable.
04 -
Spread the chocolate frosting evenly over the top layer of graham crackers. Cover and refrigerate for at least 4 hours, or overnight to allow the layers to set and soften.
05 -
Slice and serve chilled.