Fried donuts with sugar

DIRECTIONS :

1. In a bowl, dissolve the yeast in the milk.
2. Then add the eggs, sugar and vanillin.
3. Then add the flour, salt and melted butter.
4. Mix well until it forms a soft and sticky dough.
5. Let it rise for a couple of hours covered with plastic wrap.
6. Then roll out the dough and form the donuts, let them rise for 90 minutes.
7. Fry them in hot oil and pass them in sugar