Sweet Calas are southern rice fritters that used to be popular street food in New Orleans. They're fried until golden and sprinkled with powdered sugar.
In a small bowl, whisk together sugar, baking powder, salt, nutmeg, cinnamon, and flour.
In a large bowl, stir together eggs, vanilla, and rice. Add sugar mixture and stir to combine.
Pour 2 inches of oil into a Dutch oven. Heat to 360 degrees.
Use a spoon or a small spring loaded ice cream scoop to drop rice mixture into hot oil. Only cook about 6 at a time so as to not crowd the pan. Cook for about 3 minutes, flipping over halfway through.
Remove from oil and drain on paper towels. Sprinkle with powdered sugar and serve.