In a small bowl sprinkle the gelatin over 1/2 cup water. In a medium pot, combine the sugar and another 1/2 cup water and bring to a simmer; add the softened gelatin mixture and stir until fully dissolved and hot to the touch.
Pour into a large bowl (if you have a stand mixer, use it with the whip attachment), add the corn syrup and vanilla and beat on high (if you like, drape a kitchen towel overtop at first to catch splatters) for about 10 minutes, until the mixture cools and increases in volume until it has the consistency of meringue - billowy and white, and forms soft peaks.
Pour into a 9”x13” pan lined with parchment or foil and dusted generously with icing sugar, or spoon into a large (or small) zip-lock bag, snip a large piece off one corner and pipe shapes, letters, swirls or Peeps onto a piece of parchment or silicone mat or an icing sugar dusted sheet. Let cool until completely set and if you need to, cut into squares using a sharp knife sprayed with nonstick spray.
Serving Size Makes lots.