In a medium mixing bowl, beat the egg whites to a stiff peak
In a large mixing bowl, beat the egg yolks until they become light and pale
Gradually add the xylitol to the egg yolks and beat until the mixture is very light and cream color
Stir in the egg white powder, pumpkin, pumpkin pie spice, gelatin, and vanilla to the egg yolks and continue mixing with a hand mixer until all is incorporated
Fold the egg whites into the egg yolk mixture 1/3 at a time until completely incorporated
Spoon into cupcake tins
Bake at 350 for 20 minutes
Let cool and frost if desired