Preheat oven to 200C.

Separate the egg yolks from the whites. Put the egg whites into a large bowl.

Add a pinch of salt to the egg whites and whisk using a hand mixer until they form soft peaks. In a separate bowl, add the egg yolks, melted butter, almond flour, baking powder, and a third of the beaten egg whites composition. Optional - also add the stevia powder, it will reduce the 'eggy' taste of the keto bread.

Whisk using the hand mixer until well incorporated. Add the rest of the egg whites, but this time use a spatula to slowly incorporate everything. Make sure you don't overmix.

Pour the batter into a loaf pan covered with some baking paper and lightly greased over the baking paper.

Bake the bread for 30 minutes. Before removing it from the oven, do the toothpick test. If it comes out clean, it's ready.