Preheat oven to 350 degrees.

Mix the almond flour, coconut flour, psyllium husk, flax, sea salt, and baking powder in a medium bowl.

Meanwhile, boil the water.

In a small bowl beat the eggs whites, eggs and vinegar lightly (just quick enough to combine it all).

Add the eggs and vinegar mixture into the bowl with the dry ingredients. Mix with a hand whisk for about 20-30 seconds.

Add the hot water and whisk for another 30 seconds. Then use your hand (be careful, it will still be hot) and mix for another 10 seconds using a folding motion. The dough will get more "doughy" as you do this.

Since your hands will already be goopy, just scoop it equally into the 4 mini loaf molds.

Smooth out the top a bit, but it doesn't need to be perfect.

Bake for 50-55 minutes and remove from oven.

While they are still hot, remove from loaf pan. You can use a knife or thin spatula to separate the sides and then pop it out.

Let cool on a wire rack.