Add the egg mixture to the powders in two rounds; mix first with a spoon, and then by hand. Add the softened butter, bit by bit, and continue kneading. The dough will initially be loose but ...

To reheat the dish, microwave the spoon bread on high for 2-3 minutes ... Add 1/4 cup of unsalted butter to the mashed sweet potatoes and mix until the butter is completely melted and incorporated.