Sugar-glazed doughnuts are best eaten the same day.
Dough scraps can be reused, but reworked dough does not make for as smooth and perfect doughnuts.
Rising dough
Heat the oven for about 2 minutes or until just warm. Turn it off, but leave oven light turned on. Place a cup of very hot water with the bowl or baking sheet containing dough. Leave to rise as indicated in recipe.