Preheat the oven to 200C. Mix flaxseeds with 3 Tbsp and set aside for 10 min.
In a large bowl combine sourdough discard, coconut sugar, oat- and coconutmilk and flaxseeds when ready.
In a smaller bowl mix together coconut flour, oatflour, baking soda and baking powder. Add the mixture to the "wet ingredients" and mix until well combined.
Grease a donut baking tin. Divide the dough equally between the forms, reduce tempreature to 180C and bake for 15-20 minutes until fluffy and golden. Let cool completely before removing from the tin and repeat with the rest of the dough.