Which contains more calories 1 cup of popcorn or 1 cup of rices cakes?

One cup of popcorn typically contains around 30-50 calories, depending on how it is prepared, while one cup of plain rice cakes contains about 35-60 calories. Therefore, the calorie content can be quite similar, but it often depends on the specific type and preparation method of the popcorn. In general, plain popcorn usually has fewer calories than rice cakes.