Preheat your oven to 400 degrees F. Line a baking sheet with parchment. Unroll the first piece of puff pastry and lay it on the piece of parchment. Spread a few tablespoons of the marshmallow fluff onto the round of puff pastry, stopping about 1/2-inch from the edges. Sprinkle with chocolate and graham crackers. Place the second round of puff pastry on top, pressing it down slightly, pushing out any air bubbles.
Transfer to the freezer for 5 minutes (this will make it easier to cut_. Set a small drinking glad in the center of the puff pastry circle and start by cutting the pastry in 4, Then slice each quarter into 2. And then cut each eighth into 3. You should end up with about 24 twists, but really you'll be ok as long as you don't make the twists too big.
Twist each strip gently, starting at the center and then working your way outward, giving the twist support the entire time, to avoid breakage. I gave each strip about 5 to 6 turns. Repeat with the remaining strips. If the ends are jagged, feel free to take a sharp paring knife and trim the ends. Remove the glass and brush the entire thing with egg wash and transfer to the freezer to chill for 10 minutes. Then bake for 15 to 20 minutes, until evenly golden brown.