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Crispy Blooming Salmon with Sweet and Sour Sauce
Crispy Blooming Salmon with Sweet & Sour Sauce is one of those dishes that instantly brings a smile when it arrives at the table. The salmon is sliced in a crisscross pattern so it gently opens as it fries, creating beautiful crispy edges while the inside stays tender and juicy.
I actually developed this recipe during the Lunar New Year season. In Chinese culture, fish symbolize prosperity and abundance, so it’s always a meaningful dish during celebrations. Around that time, many viewers were also asking me to share more fish fillet recipes.
Since salmon is one of the most common fish you can find in supermarkets across the U.S., I thought it would be a great way to create something special that everyone could easily make at home. Inspired by the traditional Chinese crispy blooming whole fish, this salmon version keeps the festive spirit of the dish while making it simple and approachable for everyday cooking.
What Is Blooming Salmon?
Blooming salmon refers to a preparation technique where the fish opens up as it cooks, creating a dramatic flower-like shape. The method is inspired by the traditional Chinese crispy blooming whole fish, which is often served during festive meals for its beautiful presentation.
When prepared this way, the fish develops many crispy edges while the inside remains tender and juicy. The expanded shape also allows the coating to crisp evenly, giving the salmon both visual appeal and delicious texture.
How to Cut Salmon for the Blooming Effect
The blooming effect starts with a careful cutting technique.
Place the salmon fillet skin-side down and make shallow cuts across the fillet about ½ inch apart, stopping before reaching the skin. Then rotate the fillet and repeat the cuts in the opposite direction to create a crosshatch pattern.
Keeping the skin intact is important because it holds the fish together during frying. As the salmon cooks, the small sections created by the cuts gently separate, allowing the fillet to open up and create the blooming effect.
Why Use Cornstarch for Frying
Cornstarch is often used in Asian cooking when frying fish or meat because it creates a lighter, crispier coating than flour.
When cornstarch fries in hot oil, it forms a delicate crust that becomes very crisp without feeling heavy. It also absorbs less oil, which helps keep the salmon light and crunchy.
Another advantage is that cornstarch highlights the natural texture of the fish rather than covering it with a thick batter.
What Makes a Good Sweet & Sour Sauce
A great sweet and sour sauce balances three key elements: sweetness, acidity, and texture.
The ketchup and sugar provide sweetness, while rice vinegar adds brightness and tang. A small amount of cornstarch thickens the sauce so it becomes glossy and lightly coats the salmon.
Fresh ingredients like cilantro stems and red bell pepper add fragrance and a touch of freshness that lifts the flavor of the sauce.
Let’s Talk Ingredients
Salmon fillets
Salmon works beautifully for this recipe because it stays tender and juicy even after frying. The skin also helps hold the fish together after the crosshatch cuts are made.
Cornstarch
Cornstarch creates a light, crispy coating when fried. It forms a delicate crust that highlights the texture of the salmon without feeling heavy.
Cooking oil
Because the salmon is deep-fried, a neutral oil with a high smoke point works best. Oils such as avocado, peanut, or grapeseed allow the fish to fry evenly without burning.
Sweet and sour sauce
The sauce balances sweetness and acidity. Ketchup provides sweetness and color, rice vinegar adds brightness, and sugar rounds out the flavor. A small cornstarch slurry thickens the sauce into a glossy coating.
Cilantro stems and red bell pepper
These fresh ingredients add fragrance and subtle texture that brighten the sauce and complement the richness of the salmon.
Step-by-Step: Let’s Cook
Serves: 4
Prep time: 20 minutes
Cook time: 10 minutes
Step 1: Prepare the salmon
Place the salmon fillets skin-side down. Slice the fish crosswise about ½ inch apart, making sure not to cut through the skin. Turn the fillet and slice again in the opposite direction to create a crisscross pattern.
Season the salmon with salt and white pepper. Coat evenly with cornstarch and gently shake off any excess.
Tip: Keeping the skin intact helps the salmon hold together while the cuts open up during frying.
Step 2: Fry the salmon
In a pot over high heat, heat the cooking oil to 325°F (163°C). Carefully place the salmon fillets into the oil and fry until golden and crispy, about 3 minutes.
Remove the salmon and drain.
Tip: Frying at a moderate temperature allows the salmon to cook through while the coating becomes crisp.
Step 3: Make the sweet and sour sauce
In a pot over medium heat, combine the water, ketchup, rice vinegar, sugar, cilantro stems, and red bell pepper. Bring to a simmer.
Stir in the cornstarch slurry and cook until the sauce thickens and becomes glossy. Remove from heat.
Tip: Stir the slurry again before adding so the cornstarch is evenly mixed.
Step 4: Serve
Arrange the crispy blooming salmon on a plate.
Serve the sweet and sour sauce either drizzled over the salmon right before serving or on the side.
Tip: Serving the sauce on the side helps the salmon stay crispy longer.
Crispy Blooming Salmon with Sweet & Sour Sauce
Crispy Blooming Salmon is a crispy fried salmon dish cut in a crosshatch pattern so it opens into a blooming shape and served with a tangy sweet and sour sauce.
Ingredients
For the crispy blooming salmon
- 1 pound salmon fillets, skin on
- 1/8 teaspoon salt
- 1/8 teaspoon white pepper
- 2/3 cup cornstarch
- 4 cups cooking oil, for frying
For the sweet and sour sauce
- 1 cup water
- 3 tablespoons ketchup
- 1 tablespoon rice vinegar
- 3 tablespoons sugar
- 1 tablespoon cilantro stems, thinly sliced
- 1 tablespoon red bell pepper, minced
- 1 tablespoon cornstarch for slurry
- 3 tablespoons water for slurry
Instructions
- To prepare the salmon, place the salmon fillets skin-side down and slice crosswise about ½ inch apart without cutting through the skin. Turn the fillets and slice again in the opposite direction to create a crosshatch pattern. Season with salt and white pepper. Coat the salmon with cornstarch and shake off the excess.
- To fry the salmon, in a pot over high heat, add cooking oil and heat to 325°F (163°C). Carefully add the salmon fillets and fry until golden and crispy, about 3 minutes. Remove and drain on paper towels.
- To make the sweet and sour sauce, in a pot over medium heat, combine the water, ketchup, rice vinegar, sugar, cilantro stems, and red bell pepper. Bring to a simmer. Stir in the cornstarch slurry and cook until the sauce thickens.
- To serve, arrange the crispy blooming salmon on a plate and serve with the sweet and sour sauce on the side or drizzle it over the salmon.
Video
Notes
• Keep the skin intact: When cutting the crosshatch pattern, avoid slicing through the skin. The skin helps hold the salmon together while the pieces open up during frying.
• Coat evenly with cornstarch: Make sure the salmon is fully coated, then shake off the excess. A thin, even layer helps create a crisp crust without becoming heavy.
• Maintain the right oil temperature: Frying at about 325°F (163°C) allows the salmon to cook through while developing a golden, crispy exterior.
• Avoid overcrowding the pot: Fry the salmon in batches if needed so the oil temperature stays steady and the coating stays crisp.
• Stir the slurry before adding: Cornstarch settles quickly in water, so give the slurry a quick stir before pouring it into the sauce to ensure it thickens evenly.
• Serve the sauce just before eating: Drizzling the sauce right before serving—or serving it on the side—helps keep the salmon crispy.
• Protein swap: This technique also works well with firm white fish such as cod, halibut, or sea bass.