Preheat your oven to 350 degress with convection. Line an 8x4 bread baking pan with parchment paper. You can also use a 9x5 bread baking pan if that is what you have.
Add all of the dry ingredients (coconut flour, almond flour, psyllium husk powder, ground flax seed, baking soda, and salt) into a large mixing bowl and stir until combined
Measure the warm water into a small bowl and add the olive oil and apple cider vinegar
Pour the liquids into the dry ingredients and start mixing together with a fork or spatula
You will want to knead this into a dough once it is mixed together a little.
Knead the dough with your hands, right in the large bowl, for 1-2 minutes.
Once it is all combined let it sit for about 10 minutes. This will allow the fiber to soak up any excess moisture.
Next transfer the dough to the parchment lined baking pan. Cut 3 thin slits across the top of the unbaked loaf.
Set in the preheated oven and bake for 1 hour and 15 minutes (75 minutes). Once the timer rings, turn the oven off and leave the bread in for another 10 minutes. Then after the 10 minutes, open the oven but leave the bread in for an additional 10-15 minutes. The slower the bread cools down, the more rise it will keep.