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Prepare the onions: Slice the large yellow onions into 1/2-inch thick rings. Carefully separate the rings and set them aside on a plate.

Prepare the batter: In a medium bowl, combine the cornstarch, all-purpose flour, smoked paprika, Cajun seasoning, salt, and black pepper. Whisk to combine the dry ingredients thoroughly.

Add the cold sparkling water to the dry ingredients. Mix with a whisk until a thick, smooth batter forms. If the batter is too thick, add a splash more sparkling water (1 tablespoon at a time) until it reaches a pancake-like consistency. If it's too runny, add a little more flour (1 teaspoon at a time). Prepare this batter just before frying to ensure it stays fizzy.

Set up for coating: Pour the panko breadcrumbs into a wide, shallow bowl or dish. Place this bowl next to the batter bowl for easy access.

Heat the oil: Pour the frying oil into a large, heavy-bottomed pot or Dutch oven. Heat the oil over medium-high heat until it reaches a temperature of 350-375°F. Use a deep-fry thermometer to monitor the temperature.

Coat the onion rings (double dip for extra crunch): Working in batches, dip an onion ring into the prepared batter, ensuring it's fully coated. Lift it out, letting any excess batter drip off.

Transfer the battered onion ring to the panko breadcrumbs and coat thoroughly, gently pressing the panko onto the batter. Do not press too firmly; let the crumbs adhere naturally for the crispiest texture.

Dip the panko-coated onion ring back into the batter for a second coat, allowing excess to drip off. Then, coat it again with panko breadcrumbs, ensuring it's fully covered.

Fry the onion rings: Carefully place the double-coated onion rings into the hot oil, ensuring not to overcrowd the pot. Fry for 2-3 minutes per batch, or until golden brown and crispy. Flip each onion ring once during frying to ensure even cooking and browning.

Drain: Once golden brown and crispy, remove the onion rings from the oil using a slotted spoon or spider. Transfer them to a wire rack set over a baking sheet or a paper towel-lined plate to drain any excess oil. Repeat with the remaining onion rings. Serve immediately.


Prepare the onions: Slice the large yellow onions into 1/2-inch thick rings. Carefully separate the rings and set them aside on a plate.

Prepare the batter: In a medium bowl, combine the cornstarch, all-purpose flour, smoked paprika, Cajun seasoning, salt, and black pepper. Whisk to combine the dry ingredients thoroughly.

Add the cold sparkling water to the dry ingredients. Mix with a whisk until a thick, smooth batter forms. If the batter is too thick, add a splash more sparkling water (1 tablespoon at a time) until it reaches a pancake-like consistency. If it's too runny, add a little more flour (1 teaspoon at a time). Prepare this batter just before frying to ensure it stays fizzy.

Set up for coating: Pour the panko breadcrumbs into a wide, shallow bowl or dish. Place this bowl next to the batter bowl for easy access.

Heat the oil: Pour the frying oil into a large, heavy-bottomed pot or Dutch oven. Heat the oil over medium-high heat until it reaches a temperature of 350-375°F. Use a deep-fry thermometer to monitor the temperature.

Coat the onion rings (double dip for extra crunch): Working in batches, dip an onion ring into the prepared batter, ensuring it's fully coated. Lift it out, letting any excess batter drip off.

Transfer the battered onion ring to the panko breadcrumbs and coat thoroughly, gently pressing the panko onto the batter. Do not press too firmly; let the crumbs adhere naturally for the crispiest texture.

Dip the panko-coated onion ring back into the batter for a second coat, allowing excess to drip off. Then, coat it again with panko breadcrumbs, ensuring it's fully covered.

Fry the onion rings: Carefully place the double-coated onion rings into the hot oil, ensuring not to overcrowd the pot. Fry for 2-3 minutes per batch, or until golden brown and crispy. Flip each onion ring once during frying to ensure even cooking and browning.

Drain: Once golden brown and crispy, remove the onion rings from the oil using a slotted spoon or spider. Transfer them to a wire rack set over a baking sheet or a paper towel-lined plate to drain any excess oil. Repeat with the remaining onion rings. Serve immediately.
