Heat 1/4 cup of the milk just enough, add yeast and 1 teaspoon of sugar, cover and let it grow for 5 minutes.
In the bowl of a stand mixer add, the rest of the sugar, butter, salt, cornstarch and dry milk, mix just to combine.
Add the yest mixture and mix just a little, then add the egg and the rest of the milk, mix to combine, add in 3 additions the flour, if you have a hook for the mixer, use it and beat the dough for 8 minutes.
If you don’t have one, knead for 8 minutes. Then place the dough in a greased bowl and let it grow for one and a half hors.
Once ready, heat up enough oil at 350 degrees in a pot, roll out the dough,cut the donuts, shapes and sides you like and fry 2 minutes on each side and place in a sheet with some towel paper.
Have fun decorating the donuts, I made a mixture of 3 tablespoons of sugar with some orange zest to cover the sugar donuts.