Crispy Fried Fish with Sparkling Water Batter

The initial crunch of that golden crust is the best part. You're aiming for a shell that shatters instantly while leaving the fish inside moist and tender.

This recipe avoids the thick, doughy batter typical of some eateries. Instead, carbonation is used to ensure a light finish.

You'll achieve a rich gold color and a clean, sharp crispness. It's a simple process, though the precise prep work makes all the difference.

How to Make Crispy Fried Fish

What Makes It So Crispy

• The Carbonation: Tiny bubbles in sparkling water expand rapidly when they hit the heat, creating air pockets for a lighter crunch.
• Temperature Shock: The secret is the cold batter hitting hot oil, which forces moisture out of the crust instantly so it doesn't get soggy.

Ingredient Deep Dive

The Grocery List

• 1½ lb fresh white fish fillets (Cod, Halibut, or Haddock)
• 1 tsp kosher salt
• ½ tsp black pepper
• 1 cup all-purpose flour
• ½ cup cornstarch Why this? It prevents the batter from becoming too bread-like.
• 1 tsp baking powder
• 1 tsp paprika
• ½ tsp garlic powder
• 1 cup ice-cold sparkling water Why this? The CO2 creates a lighter, airier crust.
• ¼ tsp salt
• 3 cups neutral oil (such as canola or vegetable)

Tools You Will Need

You won't need professional-grade gear, but a Dutch oven or heavy-bottomed skillet is crucial. These vessels maintain heat more effectively, preventing the oil temperature from dipping when the fish is added. A wire rack is equally important, as paper towels often trap steam and soften the underside of your fried food.

From Prep to Plate

Preparing the Fish

Use paper towels to pat the 1½ lb fish fillets completely dry so the batter sticks well. Lightly season both sides with 1 tsp kosher salt and ½ tsp black pepper.

Creating the Batter

In a large bowl, whisk 1 cup all-purpose flour, ½ cup cornstarch, 1 tsp baking powder, 1 tsp paprika, ½ tsp garlic powder, and ¼ tsp salt. Gradually stir in 1 cup of ice-cold sparkling water, mixing gently until just combined.

Note: leave a few small lumps to prevent overworking the gluten.

Frying for Perfection

Heat 3 cups neutral oil to 375°F (190°C) in a Dutch oven or heavy-bottomed skillet. Dip each fillet in the batter, let the excess drain, and carefully slide the fish into the hot oil. Fry in batches to ensure the oil temperature stays consistent.

Cook for 3–5 minutes per side until the crust is dark golden, the meat flakes easily, and it hits a core temperature of 145°F (63°C). Consult the USDA fish temperature guide for safety standards.

Immediately move the fried fish to a cooling rack placed over a baking tray to keep the coating crisp.

When It Does Not Turn Out

The Batter is Peeling Away

This usually happens because the fish was damp or the oil wasn't hot enough. Make sure fillets are bone-dry and the oil is exactly 375°F before the first piece hits the pan.

The Fish is Raw Inside

If the outside is dark but the middle is underdone, your oil is too hot. Lower the heat slightly and give the fish a bit more time to cook through.

The Result is Too Greasy

This happens when you crowd the pan or use oil that has cooled down. The fried fish turns out oily because the temperature drops, and the batter absorbs oil instead of searing. Fry in smaller batches.

Easy Swaps and Add-Ins

Feel free to customize the flavor of this fried fish base. For a bolder kick, stir a teaspoon of smoked paprika or cayenne into the flour. To add a herbal touch, try incorporating dried thyme or parsley.

If you are avoiding gluten, replace the all-purpose flour with a 1:1 gluten-free blend. Just remember that gluten-free batters can be more delicate, so handle the fish with care when flipping.

Keeping It Fresh

Keep your extra fried fish in a tightly sealed container in the refrigerator; they will remain good for up to 2 days.

To keep the batter from turning rubbery, avoid using a microwave. Instead, heat the fillets in an air fryer at 375°F (190°C) for 3–5 minutes. Alternatively, use a preheated oven at 400°F (200°C) until the surface oil begins to sizzle.

For safety, confirm they have reached an internal temperature of 165°F (74°C).

What to Serve This With

I like a squeeze of fresh lemon over the top to cut through the richness. For sides, a crisp coleslaw or some thick-cut fries are the classic choice.

If you want something different, I like it with a creamy green sauce for a bright, tangy kick that balances the fried crust. Some people also enjoy a simple tartar sauce or a spicy remoulade.

High in Sodium