Preheat waffle iron and oil or grease it, unless you have a ceramic or non-stick kind.
In a large mixing bowl combine: coconut or almond milk and apple cider vinegar. Mix together well.
Add to the milk vinegar mixture: eggs, coconut or olive oil, vanilla extract. Mix together thoroughly with a whisk. Set aside.
In a second large mixing bowl combine: almond flour, coconut flour, baking powder, and 2 tsp sweetener of choice. whisk the dry ingredients together.
Add the dry flour mixture to the wet egg mixture and whisk together thoroughly.
Pour about ¼ cup batter into waffle iron being careful not to overfill. Close waffle iron and cook for 3 to 5 minutes or until steam stops rising from the waffle iron.
Carefully remove from waffle iron and serve.