01 -
Cut the onions into thick rings (about ½-inch) and separate them before setting them aside for later.
02 -
Combine the flour, cornstarch, baking powder, salt, paprika, garlic powder, and black pepper in a large bowl. Pour in the fizzy water slowly while you stir. You can whisk in the egg here for an extra crispy texture, but that's optional.
03 -
Pour the panko breadcrumbs into a shallow plate and spread them out so you don't need to fuss with them during the coating step.
04 -
Dip each onion ring into the wet batter, letting any extra batter drip off. Then roll it in the breadcrumbs. Gently press on the crumbs to make sure they stick evenly.
05 -
Heat up a good amount of oil in a deep pan or fryer to 175°C (350°F). Cook the onion rings a few at a time for 2-3 minutes—watch for them to turn golden and crunchy. Take them out and place them on paper towels to soak up any extra oil.
06 -
Sprinkle a little chopped parsley over the top and dish them out while they're still hot. Pair with your favorite sauce—ketchup, ranch, or maybe something spicy like aioli.