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Dutch pancakes
(reddthat.com)
Easy to make and perfect for cast iron. I tend to coat the pans between pancakes with a tiny bit of canola oil using a brush.
Apart from the recipe, they're flat enough that you can roll them. The recipe is 100 gr of flour to 210gr of milk (1:2.1), with a pinch of salt and 1 egg. Add more milk to get the desired fluidness depending on your flour.