You can try adding a touch of cream of tartar (1/4 teaspoon), vinegar (1/4 teaspoon), or lemon juice (1/4 teaspoon) to help whip up your eggs. Cloud bread bakes at a very low temperature. If the inside of your cloud bread is raw, you can just put your cloud bread back into the oven until it is baked through. Cream of tartar, vinegar, and lemon juice are all acids that help stabilize the egg whites and encourage them to get extra whipped.
Why didn’t my cloud bread bake through?
If your cloud bread is golden brown on the outside but still under baked on the inside it might be because your oven is running too hot. Some ovens aren’t calibrated well or have hot spots. It probably means that the oven was too hot and that the outside of the bread cooked faster than the inside. Cloud bread bakes at a very low temperature. If the inside of your cloud bread is raw, you can just put your cloud bread back into the oven until it is baked through.