Kuih kaswi, or kosui, is that soft, jiggly steamed kuih in a little cup, usually gula melaka brown or pandan green, rolled in fresh grated coconut. It is rice flour set with palm sugar, so the sugar is the main calorie driver and the coconut coating adds the fat. A piece is around 115 calories.
Simple treat. The plain ones without much coconut are lighter, around 90, while a generously coconut coated market piece can hit 160. One is a fine little sweet with your kopi. Like all kuih, the pile is the problem, not the single piece.