amount of water in buckwheat muffins?

[MaxArtist]

made these last year, and fancied doing them again this week as i remembered how good they were - and craved muffins to go with my sweet potato soup.
either i made a mistake, or the amount of water is far too much (86%): 300 water for just 350 flour?
i ended up adding more flour to make the dough more manageable (which i never do, but this time it just didn't feel right).
dough was VERY wet and sticky.
anyway, they turned out great in the end and were enjoyed by all!

[Aspiring Vegan]

I had a similar experience when I first tried these and have made them several times since, using about 130g of water instead of 200g (that's in addition to the 100g to soak the buckwheat).

I did wonder if there are different types of toasted buckwheat. The kind I get (also known as kasha) goes very soft as soon as the boiling water is added, so perhaps it's pre-cooked and there's another kind that would absorb more of the water.

BTW I veganise this recipe by using 2 tablespoons of olive oil instead of the butter. I also put the dough in the fridge overnight (as per the cider vinegar muffins in the Guardian Guide to Baking).