Beef Burgers with Fermented Hot Sauce and Crispy Onion Strings

Name: Beef Burgers with Fermented Hot Sauce and Crispy Onion Strings
Prep time: 25 min
Cook time: 20 min
Total time: 45 min
Yield: 4 servings
Cuisine: Cajun & Creole
Ingredients: 1½ lb (680 g) ground beef (80/20 blend), cold, not overworked; 1¼ tsp (7½ g) kosher salt; ½ tsp (1 g) freshly cracked black pepper; ¼ tsp (½ g) cayenne pepper; ½ tsp (1½ g) garlic powder; ¼ tsp (¾ g) onion powder; 1 tbsp (14 g) unsalted butter; 1 whole (200 g) large yellow onion, sliced into ⅛-inch-thick strings (using a mandoline or knife); ½ cup (60 g) cornstarch; ¼ tsp (½ g) smoked paprika; ½ tsp (3 g) kosher salt; 2 cup (480 ml) vegetable oil; ½ cup (115 g) mayonnaise; 3 cloves (15 g) garlic cloves, minced; ½ tbsp (7½ ml) fresh lemon juice; ⅛ tsp (¾ g) kosher salt; ¾ cup (180 ml) fermented hot sauce (store-bought or homemade); 4 whole brioche burger buns, lightly toasted if desired; 4 leaves (60 g) crisp lettuce leaves (green leaf or romaine) (optional); ½ whole (100 g) tomato, sliced ¼-inch thick (optional)

From the MyKitchenBank Kitchen

Juicy, well-seasoned beef burgers crowned with homemade fermented hot sauce, crispy fried onion strings, and smooth garlic aioli. A Louisiana Creole-inspired burger with deep flavor from the patties, heat from aged hot sauce, and textural contrast from the onions. Pan-seared for a golden crust and tender interior.

Prep: 25 min
Cook: 20 min
Wait: 10 min
Total: 55 min
Makes: 4 burgers

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Ingredients

4 servings

For the burgers
1½ lb (680 g) ground beef (80/20 blend), cold, not overworked
1¼ tsp (7.5 g) kosher salt
½ tsp (1 g) freshly cracked black pepper
¼ tsp (0.5 g) cayenne pepper
½ tsp (1.5 g) garlic powder
¼ tsp (0.8 g) onion powder
1 tbsp (14 g) unsalted butter
For the crispy onion strings
1 whole (200 g) large yellow onion, sliced into ⅛-inch-thick strings (using a mandoline or knife)
½ cup (60 g) cornstarch
¼ tsp (0.5 g) smoked paprika
½ tsp (3 g) kosher salt
2 cup (480 ml) vegetable oil
For the garlic aioli
½ cup (115 g) mayonnaise
3 cloves (15 g) garlic cloves, minced
½ tbsp (7.5 ml) fresh lemon juice
⅛ tsp (0.8 g) kosher salt
For serving
¾ cup (180 ml) fermented hot sauce (store-bought or homemade)
4 whole brioche burger buns, lightly toasted if desired
4 leaves (60 g) crisp lettuce leaves (green leaf or romaine) (optional)
½ whole (100 g) tomato, sliced ¼-inch thick (optional)

Equipment (7)

Large skillet or cast-iron griddle (12-inch)
Small saucepan
Deep heavy pot or Dutch oven for frying
Meat thermometer
Paper towels
Slotted spoon or spider strainer
Small bowl for mixing aioli

Steps

Before you start

Keep ground beef cold until ready to form patties
Make or gather the fermented hot sauce at least 3 days ahead
Have all toppings and condiments prepped and ready before cooking
Use a meat thermometer to ensure burgers reach 160°F (71°C) for food safety

1
Prepare the crispy onion strings
- Separate the onion slices into individual strings and place them in a colander.
- Let them sit for 10 minutes to release excess moisture, then pat dry with paper towels—this ensures crispy, not soggy, results.
- In a small bowl, whisk together the cornstarch, smoked paprika, and salt.
- Working in batches, toss the dry onion strings in the cornstarch mixture, shaking off excess, and lay them on a tray.
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Ready when: Strings are dry and evenly coated
Tip: Drying the onions is crucial; any moisture will cause splattering oil and soggy strings.
2
Heat oil and fry onion stringsOven 350°F / 175°C
- Pour the vegetable oil into a deep heavy pot and heat to 350°F (175°C).
- Working carefully in batches to avoid overcrowding, add the cornstarch-coated onion strings.
- Fry for 2–3 minutes, stirring gently with a slotted spoon, until they are golden and crispy but not dark brown.
- Remove with the spoon and drain on paper towels.
- Season lightly with a pinch more salt while still warm.
- Keep the oil at 350°F between batches.
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Ready when: Onion strings are golden and crispy
Tip: Use a thermometer to keep oil at 350°F; too hot and they'll burn, too cool and they'll absorb oil.
3
Make the garlic aioli
- In a small bowl, stir together the mayonnaise, minced garlic, lemon juice, and salt until smooth and well combined.
- Taste and adjust seasoning.
- Set aside at room temperature.
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Ready when: Aioli is smooth and well combined
Tip: Don't skip the lemon juice; it brightens the garlic and balances the richness of the mayo.
4
Form burger patties
- Place the cold ground beef in a large bowl.
- Sprinkle the kosher salt, black pepper, cayenne, garlic powder, and onion powder over the meat.
- Using your fingertips, gently fold and mix just until the seasonings are evenly distributed—do not overwork or squeeze the meat, or the burgers will become dense.
- Divide into 4 equal portions (about 6 oz/170 g each).
- Form each into a patty about ¾ inch thick and 4 inches wide.
- Make a shallow dimple in the center of each patty with your thumb to prevent them from puffing up during cooking.
- Chill the patties for at least 10 minutes.
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Ready when: Patties are compact, evenly shaped, and cold to the touch
Tip: Handle the meat as little as possible; overworking creates tough, dense burgers. The dimple prevents them from bulging like a dome.
5
Heat skillet and sear patties
- Place a large skillet or cast-iron griddle over medium-high heat.
- When the pan is hot, add the butter and let it foam.
- Working carefully, place the burger patties in the pan, leaving about 1 inch between them.
- Do not move them for 3–4 minutes; this builds a golden, flavorful crust.
- The internal temperature should reach about 120°F (49°C) for medium-rare.
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Ready when: Bottom of patties are deep golden brown and crispy
Tip: Resist the urge to press or move the patties; this releases flavorful juices and prevents the crust from forming.
6
Flip and finish cookingOven 160°F / 70°C
- Flip the patties and cook for another 3–4 minutes on the second side, until the internal temperature reaches 160°F (71°C) for fully cooked burgers, or 145°F (63°C) for medium-rare (note: the USDA recommends 160°F for ground beef).
- The exterior should be a deep golden-brown crust.
- Remove from heat and let the patties rest on a warm plate for 2 minutes.
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Ready when: Internal temperature reaches 160°F (71°C) and exterior is deeply browned
Tip: Use a meat thermometer inserted horizontally into the thickest part to check doneness accurately. Let them rest so juices redistribute into the meat.
7
Assemble and serve
- Spread about 1 tablespoon of the garlic aioli on the bottom half of each toasted bun.
- If using, layer a lettuce leaf and tomato slice on top.
- Place a warm burger patty on each bun.
- Drizzle or spoon 2–3 tablespoons of the fermented hot sauce over the patty.
- Crown with a generous handful of the crispy onion strings.
- Top with the bun lid and serve immediately.
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Ready when: Burgers are fully assembled and ready to eat
Tip: Assemble the burgers immediately after cooking and resting so the patties stay warm and the aioli doesn't separate.

Good to know

Tips

Keep ground beef cold until you form the patties; warm meat is harder to shape and won't cook evenly. A hot skillet and cool meat create the best crust.
Crispy onion strings are key to this burger's Louisiana character; don't skip them, and don't crowd the pan when frying or they'll steam instead of fry.
For truly outstanding flavor, make or source a quality fermented hot sauce (Tabasco, Louisiana, or Truff are good starting points) rather than using a vinegar-based sauce.
Toast the buns lightly to create a barrier that protects them from soaking up moisture, especially important with the wet hot sauce and juicy patties.

Make ahead

Fermented hot sauce can be made 1–3 months ahead and stored in the refrigerator in a sealed jar. Garlic aioli can be prepared up to 2 days ahead and refrigerated. Burger patties can be formed, wrapped individually, and frozen for up to 3 months; cook from frozen, adding 2–3 extra minutes per side.

Storage & reheating

Store leftover cooked burgers loosely wrapped in foil in the refrigerator for up to 2 days; reheat gently in a 325°F (163°C) oven for 5–7 minutes. Store crispy onion strings in an airtight container at room temperature for up to 1 day (they will soften over time). Store garlic aioli in the refrigerator for up to 3 days. Fermented hot sauce keeps in the refrigerator for 1–3 months in a sealed jar.

Substitutions

garlic cloves → 0.5 tsp garlic powder or 0.5 tsp roasted garlic paste. Use if fresh garlic is unavailable. Roasted garlic gives a milder, sweeter flavor than raw.
fermented hot sauce (store-bought or homemade) → Sriracha, Frank's RedHot, or any fermented hot sauce of your choice. Any aged or fermented hot sauce works; adjust quantity to taste and desired heat level.
brioche_burger_buns → Potato buns, ciabatta rolls, or sourdough buns. Brioche is soft and absorbs juices; if using heartier bread, you may want to toast it more lightly.
ground beef (80/20 blend) → Ground beef 85/15 blend or 90/10 blend. Higher fat (80/20) yields juicier burgers; leaner blends produce drier patties. Stick with at least 80/20 for the best texture.