Tender, Sizzling Hush Puppies

Fluffy hush puppies served with a sweet and spicy butter make for the ultimate appetizer.

• Canola oil, for frying
• 6 tablespoons unsalted butter (3 ounces), frozen
• 1 medium-size yellow onion
• 3/4 cup fine yellow cornmeal (such as Marsh Hen Mill Jimmy Red Cornmeal)
• 1/2 cup all-purpose flour (about 2 1/8 ounces)
• 2 teaspoons baking powder
• 2 teaspoons granulated sugar
• 1 teaspoon kosher salt, plus more to taste
• 1/2 teaspoon black pepper, plus more to taste
• 1/2 teaspoon garlic powder
• 1/4 teaspoon onion powder
• 1 1/3 cups buttermilk
• 2 large eggs, beaten