
Preheat the oven to 180C/350F. Line a large baking tray with parchment paper and set aside.
In a large mixing bowl, add the egg whites. Using a hand mixer, beat the egg whites until medium peaks form. Add the cornstarch or coconut flour and continue beating, until stiff peaks form.
Transfer the mixture into the lined tray. Using the back of a spoon, shape it into a circular pizza shape. Place it in the oven and bake for 15-17 minutes, until golden on top.
Remove the crust from the oven. Top with sauce, shredded cheese, and other toppings of choice. Spray the crust with cooking spray and place back in the oven for 5-10 minutes, until the cheese has melted.
Remove the cloud pizza from the oven and slice and serve immediately.