In a small bowl add the 1/2 cup cold water and sprinkle the gelatin packets on top. Set aside to bloom.
In a medium pot over medium heat, add the other 1/2 cup water, corn syrup, and sugar. Stir to combine and keep stirring occasionally until this mixture starts bubbling (about 5 minutes).
Turn heat to medium high and allow to cook without touching for another 5 minutes.
Pour this hot mixture into a stainless steel stand mixer bowl.
Allow to sit and cool ever so slightly for 5 minutes.
Add the bloomed gelatin to bowl and mix on low until melted and combined for 1 minute.
Turn the speed up to medium high and mix for about 8-10 minutes until the mixture becomes white and fluffy.
Dump this mixture into a greased baking dish, cover with foil, and refrigerate for 6 hours or overnight.
Once set, remove from baking dish, dust with sifted powdered sugar, cut into cubes and serve on top of hot chocolate!