Preheat the oven to 180 degrees C.
While the oven is heating up, take flax seed powder, brown sugar, salt, coconut oil, coconut buttermilk into a mixing bowl and mix everything well.
To this mixture, now add water or milk and whisk it well. Keep this wet mixture aside.
Take a sieve, add buckwheat flour to it.
Then add cacao powder, baking soda, and dry ginger powder.
Sift and mix everything well so that all ingredients are combined well.
Now add sifted flour mixture to the wet mixture in 3 parts and prepare cookie batter.
The batter will be a little runny and pouring consistency.
Line a baking sheet and pour a tablespoon of batter on it the baking sheet.
Keep the baking tray in the middle rack of the oven and bake the cookies for 12 minutes at 180 degrees C.
Different ovens behave differently, so it's good to look at the cookies at around 10 minutes of baking time to avoid burning the cookies.
Once done, take the baking tray out of the open and let the cookies cool down a bit.
Store the cooled cookies in an airtight jar and enjoy them with a glass of milk or as they are.