Instructions:
- Preheat oven to 350°F (175°C). Grease and line a standard 9x5 inch loaf pan with parchment paper, leaving an overhang for easy removal.
- In a medium bowl, whisk together the almond flour, baking powder, and salt until thoroughly combined.
- In a separate bowl, whisk the 4 egg yolks, melted coconut oil/butter, apple cider vinegar, and warm water until smooth.
- Pour the wet yolk mixture into the dry ingredients. Stir gently with a spatula until just combined. Do not overmix; the batter will be thick.
- In a clean, grease-free bowl, use an electric mixer to beat the 4 egg whites until stiff, glossy peaks form.
- Gently fold one-third of the whipped egg whites into the almond flour batter to lighten it. Then, carefully fold in the remaining egg whites in two additions until no white streaks remain. Be gentle to maintain air.
- Transfer the batter to the prepared loaf pan, spreading it evenly. Bake for 45 to 55 minutes.
- The bread is done when golden brown on top and a skewer inserted comes out clean. Let the bread cool in the pan for 10 minutes before lifting it onto a wire rack to cool completely before slicing.