Papas Hushpuppies

Name: Papa's Hushpuppies
Ingredients: 1 1/4 cups finely ground cornmeal; 1/4 cup gluten-free all-purpose flour; 1 1/2 teaspoons baking powder; 1 1/2 teaspoons unrefined cane sugar; 1 1/2 teaspoons kosher salt; 1 1/2 teaspoons finely ground black pepper; 1/4 plus 1/8 teaspoon baking soda; 1/4 teaspoon ground cayenne pepper; 1/2 cup finely diced red onion; 1 large egg; 1 egg yolk lightly beaten; 3/4 cup well-shaken buttermilk