01 -
Get your oven set to 300°F (150°C). Using a hand or stand mixer on high, whip your egg whites with the vinegar until stiff peaks form. This can take about 10 minutes. Put it aside for now.
02 -
Mix together the yolks, cottage cheese, protein powders, baking powder, salt, and allulose (if you want some sweetness) in a bowl. Whisk by hand or use a blender till it's smooth.
03 -
Carefully mix the whipped whites with the yolk blend. Do this a bit at a time so you don't lose that fluffiness.
04 -
Grease a 5×9-inch loaf pan and line it with parchment. Pour in your batter and bake in the center of the oven for about 50 minutes or until the top’s golden and a toothpick comes out clean.
05 -
Once done baking, turn the oven off but leave the bread in there for 10 minutes. Then take it out to cool slightly.