A batch of these homemade onion rings can lift up the day. Thanks to the panko breading, they're very crunchy and perfect for dipping in different sauces while watching a game, tailgating, on movie night or having a casual outdoor barbecue.
Pour the frying oil into a deep saucepan or suitable pan for deep frying and place it over low heat. The ideal temperature is 350°F to 375°F (175°C to 190°C).
Cut 2 medium-sized onions into ½ to ⅓ inch thick rings and separate them into individual onion rings. Place them on paper towels so they absorb any liquid they might release.
Stir ¼ cup all-purpose flour (half the amount), ½ teaspoon salt, ⅕ teaspoon black pepper and ⅓ teaspoon garlic powder in a shallow plate or bowl. If using other spices (like cayenne or chili powder) or dried herbs like thyme, stir them in now.
In another shallow bowl, whisk together 1 egg, ½ cup buttermilk, 1 teaspoon baking powder and remaining ¼ cup all-purpose flour. The batter should be quite thick, similar to pancakes.
Pour 3 cups panko breadcrumbs into a separate shallow plate or bowl.
Make sure the onion rings are dry, and coat them in the flour mixture, shaking off excess.
Transfer the floured rings to the buttermilk batter and coat until each ring is evenly coated, shaking off excess.
Finally, roll the battered rings in the panko, covering them completely.
Fry for 1-2 minutes in 3 to 4 cups frying oil, focusing on the breading's color. It should be orange, but not brown.
Place the fried onion rings on paper towels to absorb excess oil for a few minutes.
Serve immediately with the sauce of choice.
Notes
Flavor variations: make them spicier by adding cayenne pepper, paprika or chili powder to the flour mixture. Add a dry herb like thyme or oregano.