Step-by-step cooking method Place water to boil in a saucepan. Put the flour into a bowl. When the water begins to boil, pour it onto the flour. Stir it well until it becomes a compact dough. Leave the dough to rest for a few minutes with a cloth over it. Insert the dough into a pastry bag and shape the churros. Spray the churros with a little oil. Cook the churros in the fryer and turn them over during the cooking process until they are ready. Sprinkle with sugar to serve.