01 -
Heat oven to 300°F (150°C). In a mixing bowl, beat egg whites with the vinegar using a stand or hand mixer on high until stiff peaks form. This should take around 10-15 minutes. Put aside for now.
02 -
In another bowl, mix egg yolks with cottage cheese, baking powder, salt, whey protein powder, egg white protein powder, and allulose (if using). Whisk together or throw it into a blender until smooth.
03 -
Slowly add the yolk mix into the fluffy egg whites, folding it gently bit by bit. Be careful not to lose the airiness.
04 -
Line a 5×9-inch loaf pan with greased parchment paper. Pour in the mixture and bake it on the middle rack for 50 minutes. You'll know it's done when a toothpick comes out clean and the top has turned golden.
05 -
Once the timer buzzes, leave the bread in the oven with the heat off for 10 minutes, keeping the door shut. Then take it out and let it cool down a bit before serving.