Step 1

Combine the cornmeal, flour, sugar, baking powder, salt, and cayenne pepper in a large mixing bowl.

Step 2

In a separate bowl, whisk together the egg, and buttermilk. Add to the dry ingredients along with the grated onion and its juices, stirring until combined.

Step 3

Heat 2 inches of oil over medium-high heat in a large cast iron skillet or dutch oven until it reaches 375°F on a digital thermometer. When hot, carefully use two spoons to drop tablespoonfuls of batter into the hot oil, using the back of one spoon to push the batter in one at a time. Work in batches so as not to overcrowd the pan. Fry for 2-3 minutes, turning partway through with a wire spatula, until the hush puppies are golden brown.

Step 4

Remove the hush puppies from the oil and transfer to a wire rack set over a baking sheet lined with paper towels. Keep an eye on the oil temperature while frying so that it stays consistent, adjusting the heat up or down as necessary.