So I followed the following recipe once and the bread buns turned perfect. Today I decided to make it more coconut-ish so that it tastes and smells like coconut even more than the previous batch. I substituted half of the flour with coconut flour, added more coconut flakes and substituted the butter with coconut butter (that is what I did the first time, using coconut butter)! It seems that I messed it up and it is so crumbly that I cannot knead it! I came up with the idea that I might make small buns that look like cookie but then I added yeast, how to fix it? Or what to make with this crumbly dough?
4 cups flour
4 tbsp coconut flakes
50 gr butter
2 tsp yeast
vanilla 1/2 tsp
salt 1 tsp
sugar 1/3 cup
You can't substitute a non-wheat flour for a wheat flour and expect similar baking properties; bread doughs rely on gluten for their structure which is why gluten-free baking is difficult.
The simplest way to fix this would be to double the recipe, look at what you've already added, and add more ingredients up to the correct amounts. You can freeze bread dough which helps mitigate the 'too much' problem although I appreciate it might get you through your ingredients faster than you'd want.
If you're dead set against that, add more flour in small quantities and try to knead the dough until it has a workable consistency, and see how it comes out.
For your broader desire for the bread to have a stronger coconut flavour, consider buying coconut extract or essence and adding that to the original recipe.