Call it Tic Tac Dough. These little fry breads are an excellent street snack in Bangkok. The x-shaped versions have a slight saltiness to them and are often eaten with a bowl of congee or cup of coffee for breakfast. The o-shaped form is slightly sweet (no frosting or sugar coating though) and are called sala pao — not to be confused with the Chinese steamed pork bun of the same name. They cost about 3 baht each and are often served with sang ka ya, a green-colored dipping sauce made with coconut milk, brown sugar, and eggs. The green coloring comes from bai toey (pandanus leaf).
They are best fresh of course, which they are likely to be as they sell fast. Watch for them on sidewalks or at larger markets such as On Nut Market.