Sweet Potato Waffles Recipe | Alton Brown

Ingredients

• 1 1/2 cups sweet potatoes, peeled and cubed
• 1 cup whole milk
• 1/4 cup light brown sugar
• 4 tablespoons unsalted butter, melted
• 1 tablespoon orange zest
• 2 cups all-purpose flour
• 1 tablespoon baking powder
• 1/2 teaspoon kosher salt
• 6 large egg whites, at room temperature