Puto is a traditional steamed rice cake from the Philippines—soft, slightly sweet, often topped with cheese or salted egg. It is a food, not a celestial body.
"Puto" sounds like "Pluto" (dwarf planet, equatorial radius ~1,188 km) or perhaps a misspelling of a planetary name. But in Tagalog and Filipino cuisine, puto is a beloved breakfast/merienda staple made from galapong (fermented rice batter).
So, if you're hungry, visit a Filipino bakery. If you're doing orbital mechanics, check NASA's planetary fact sheets.