Wikipedia
A buñuelo (alternatively called bimuelo, birmuelo, bermuelo, burmuelo, or bonuelo; , ) is a fried dough ball. It is a popular snack in Argentina, Bolivia, Colombia, Cuba, El Salvador, Guatemala, Mexico, Nicaragua, Puerto Rico, Ecuador, Uruguay, Spain, Greece, Guam, Turkey and Morocco, and is a tradition at Christmas, Ramadan, and among Sephardic Jews at Hanukkah. It will usually have a filling or a topping. In Mexican cuisine, it is often served with a syrup made with piloncillo.
Buñuelos are first known to have been consumed among Spain's Morisco population. They typically consist of a simple, wheat-based yeast dough, often flavored with anise, that is thinly rolled, cut or shaped into individual pieces, then fried and finished off with a sweet topping. Buñuelos may be filled with a variety of things, sweet or savory. They can be round in ball shapes or disc shaped. In Latin America, buñuelos are seen as a symbol of good luck.