24 graham crackers, crushed, 12 tablespoons unsalted butter, melted, 5 oz instant vanilla pudding mix, 2 1/2 cups heavy cream, 1/2 cup chocolate candy pieces, whipped cream for serving.
Line a baking sheet with parchment paper.
In a medium bowl, mix together the graham cracker crumbs and butter until fully incorporated.
Pour the crumbs into the prepared baking sheet and press firmly in an even layer. Transfer to the refrigerator to firm, about 1 hour.
In the bowl of a stand mixer fitted with the whisk attachment, combine the pudding mix and heavy cream and whip until light and fluffy, about 5 minutes.
Spread the pudding over the crust and top with the candy pieces.
Slice into 12 bars and serve with a dollop of whipped cream.