Sprinkle powdered gelatin over cold water. Set aside.
2 teaspoons Powdered Gelatin, 2 Tablespoons Cold Water
Place egg whites, sea salt, sugar and corn syrup in bowl of a stand mixer. Whisk by hand to combine.
4 Large Egg whites, 1 Cup Granulated Sugar, ½ teaspoon Salt, ½ Cup Light Corn Syrup
Place bowl over a pot of simmering water. The bottom of bowl should not touch the water. Whisk occasionally – every 2 – 3 minutes.
Continue to heat until the mixture reaches 160° F (approximately 10 minutes).
Remove the bowl from heat. Add gelatin and stir until melted.
Place bowl on the mixer and, using the whip attachment, whip until icing has cooled. The icing will be fluffy, white and hold stiff peaks (this will take several minutes).
Quickly spread the marshmallow topping over pie filling.
Optional: lightly torch the marshmallow frosting. Sprinkle with graham cracker crumbs and chocolate pieces.