mixture is firm and stable.
Add the dark chocolate chips. Using a spatula, gently fold them into the egg-white mixture with slow movements from the bottom of the bowl toward the top. Avoid stirring or mixing vigorously, as this can knock out the air you’ve worked into the egg whites.
Transfer the mixture to the prepared baking sheet. Shape it into a small, tall loaf or rounded mound, keeping as much height as possible.
Bake at 300°F (150°C) for about 20 minutes, or until the exterior is lightly