The instructions to “drain and rinse well” a can of beans might seem like a minor suggestion, but for this recipe, it’s a non-negotiable step that is absolutely critical for achieving the perfect crispy texture. Here’s the science behind this simple action.
The liquid in canned beans, known as aquafaba, is starchy and viscous. If you don’t rinse it off, this starchy coating will prevent the beans’ skins from drying out and crisping up in the oven. Instead, they will steam in their own liquid, resulting in a soft, or even mushy, texture.
Rinsing also washes away excess sodium that is often present in the canning liquid, giving you more control over the final seasoning of your dish. A thorough rinse under cold water until the water runs clear is all it takes.
This small, simple step is the secret to transforming a soft, canned bean into a delightfully crunchy, golden-brown nugget. It’s a perfect example of how a tiny detail in technique can make a huge difference in the final outcome of a dish.