Make the dough

• Combine the flour, yeast, sugar and baking salt in a bowl.
• Add the vinegar and warm water.
• Mix and knead into a smooth, soft dough.

Let the dough rise

• Cover the bowl and leave the dough in a warm place until doubled in size.

Shape the donuts

• Divide the dough into portions.
• Shape each portion into a ring with a hole in the middle.

Fry the donuts

• Heat the oil in a pot.
• Fry the donuts until golden on both sides.
• Drain on paper towels.