With these sweet rice cakes being so ubiquitous, I’d never learned to make them until I came to the US. Nobody in my family made/make them either. Many street foods — most of them, if you ask me — are best left to the pros. Pad Thai, for example, is not generally a family dish which people make at home. Nang Let (also spelled Nang Led) or Khao Taen (in the Northern dialect) isn’t either, though it’s possible that it might have begun in the Northern (or even Northeastern) region as a way of repurposing old, leftover sticky rice in the pre-microwave days.