Kuih Kapit, also called Love Letters or kuih sepit, is that thin crispy folded wafer your aunty makes in bulk for Chinese New Year using a special hinged iron mould pressed over a flame. The batter is simple: rice flour, egg, coconut milk and sugar. Each piece is light, maybe 8g, and at 40 calories a wafer it sounds harmless. The problem is nobody eats just 3. You sit in front of the tin while watching TV and suddenly you have eaten 15 pieces, which is 600 calories of snack you barely registered. The calories come mainly from the carbs (flour and sugar) plus the fat from coconut milk. It is genuinely delicious and there is nothing wrong with it, just know what you are working with.
The maths change fast with quantity. Stick to 3 pieces (25g, 120 calories) as an actual conscious serving rather than a background snack and it is totally fine as a treat. The sesame seed variant nudges up to about 135 calories for the same 3 pieces because of the added fat from the seeds. If you are making these at home, the coconut milk is the biggest lever: swapping thick coconut milk for a lighter version can shave 10 to 15 calories per serving without killing the texture. The honest answer on all these numbers though is treat them as a reasonable estimate, not gospel, because hard nutritional data for traditional kuih like this is scarce and recipes vary quite a bit between households and commercial makers.