Twisted Korean doughnuts (Kkwabaegi: 꽈배기)

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These kkwabaeggi (꽈배기), or twisted donuts, were one of my favorite after-school treats when I was a kid, something you can still find in many Korean bakeries and being sold on Korean streets today.
Full recipe:
My cookbook: Источник видео youtube.com/watch?v=lLy9ojZZFOw