The popular origin story of churros, linking the globally famous Spanish food icon with the Chinese you tiao lacks documentary evidence (so I shall look for them).
Traditionally made only with wheat flour, salt and water, churros are oil fried dough sticks flavoured with a dusting of sugar and cinnamon powder). Churros are often enjoyed with a cup of hot chocolate. In the Spanish world, churros are enjoyed at churrerias as well as street side stalls.