S'mores Puff Pastry Mini Tarts

Preheat the oven to 425 degrees F. Prepare a mini cupcake tin or mini brioche pan with nonstick cooking spray. Set aside. Roll out 1 sheet of puff pastry; use a round biscuit cutter to cut out 12 circles of dough. Press each into the prepared baking pan. Poke holes into each crust with a fork. Repeat the entire process with the second sheet of dough. In the bowl of a stand mixer, make a meringue by beating the egg whites until soft peaks form. While whipping, add in the granulated sugar until stiff peaks form, about 2 minutes. You should be able to turn the bowl upside down without the meringue moving. Stir the graham cracker crumbs into the pudding. Set aside. Once the crusts are cooled, fill each with a large spoonful of pudding, then top with a dollop of frosting. Toast the frosting, if desired.