Cloud Bread

Why This Cloud Bread Works

During mixing, the egg whites trap a lot of tiny air bubbles. Beating them to soft peaks means the whites are full of air but still a bit flexible. As the sugar goes in slowly, it coats those bubbles and makes the foam stronger and smoother. The mixture becomes glossy and thick, so it can hold its shape on the baking sheet instead of spreading flat.

Once the cornstarch is folded in, it gives the foam a bit of gentle support. It sits between the bubbles and keeps them from popping so easily. In the oven, the heat sets the egg whites around all that air. At the same time, the cornstarch firms up and the sugar dries out on the outside. Over the baking time, the rounds keep their puffed shape, the outside dries and gets lightly golden, and the inside stays soft and light. After cooling, the structure stays in place, so the bread feels airy and cloud-like instead of collapsing.

Mistakes To Avoid

Beating the egg whites in a greasy or wet bowl often stops them from whipping up properly. The whites stay foamy and loose instead of forming stiff peaks, so the mixture spreads flat on the tray and bakes into thin, chewy disks instead of puffy clouds.

Adding the sugar too fast causes the foam to collapse. Large sugar crystals weigh down the whites before they are strong enough, so the mixture turns runny and grainy, and the baked bread comes out dense with a sticky center.

Overmixing after the cornstarch goes in can knock all the air out. The mixture looks shiny but much thinner, and in the oven it barely rises and sets into a rubbery, flat sheet instead of light, airy pieces.

Baking at a higher temperature than 300°F (150°C) makes the outside brown too quickly while the inside stays soft and under-set. The cloud bread may puff, then sink as it cools, leaving hollow tops and gummy centers.