In warm milk add the yeast and leave for 10 minutes. Butter (room temperature or melted) beat eggs and add sugar.

Add the yeast, salt, vanilla and whisk. Next, begin to add the flour not all at once, the flour is all different, so you may need less flour, and maybe more. The dough is kneaded, put in a container greased lightly with vegetable oil and place in a warm place for 1 hour. The dough is increased 3 times.

Roll the dough 1 cm thick, squeeze out a glass circles and fry both sides well in hot oil over medium heat.

Fried donuts spread on a paper towel to remove the excess fat.

The filling you can use any you like. I offer You three kinds of toppings, which I usually use. 1) Boiled condensed milk. 2) Apple, finely chopped cube + sugar + cinnamon. 3) cottage Cheese + sugar. The ingredients I pointed out the approximate for the filling. Make a cut down the middle of the donut and spread any filling. I spread it with a spoon. Sprinkle with powdered sugar.