Sweet & Sour Chicken is a long-standing family favorite at our table—the dinner Oma requests every time she visits. Crisp, double-fried chicken breast meets a glossy sauce built from pineapple, balanced vinegars, a touch of ketchup, and just enough sweetness to round everything out. Bright peppers, fresh tomatoes, and optional mango give it depth without losing its classic comfort.
Ingredients
Sauce
- 2 cups (475 ml) chicken broth (optional: replace up to 1 cup / 240 ml with mango juice)
- ½ cup (120 ml) seasoned rice vinegar
- 2 tbsp (30 ml) unseasoned rice vinegar
- ¾ cup (150 g) sugar
- 1 tbsp (15 ml) vegetable oil
- 1 tbsp (15 g) ketchup
- 1 tsp light soy sauce
- ¼ tsp MSG
- 1 tsp table salt, plus more to taste
- 1 large yellow onion, sliced (for infusion)
- 3 cloves garlic, finely chopped
- 1 can (20 oz / 567 g) pineapple chunks, drained (reserve ½ cup / 120 ml juice)
- 3–4 tbsp (24–32 g) modified cornstarch (or 3½–4 tbsp / 28–32 g regular cornstarch)
- ¼ cup (60 ml) cold water (for slurry)
Vegetables
- 1 large yellow onion, sliced into ½-inch (1.25 cm) strips (for stir-frying)
- 2 bell peppers, cut into 1-inch (2.5 cm) pieces
- 2 fresh tomatoes, cut into wedges
- 1–2 tbsp (15–30 ml) vegetable oil (for stir-frying)
- ½ tsp sugar (for stir-frying)
Chicken
- 1½ lb (680 g) chicken breast, cut into 1¼-inch (3 cm) cubes
Marinade
- 1 egg, lightly beaten
- 2 tbsp (16 g) cornstarch
- 2 tbsp (30 ml) vegetable oil
- 1 tsp soy sauce
- 1 tsp table salt
- ¼ tsp white pepper
Batter & Frying
- ⅔ cup (80 g) flour
- ⅓ cup (40 g) cornstarch
- 1 tsp table salt
- 1 tsp baking soda
- ⅔–¾ cup (160–180 ml) very cold water
- 1–2 tbsp (8–16 g) cornstarch (for dusting chicken)
- Vegetable oil, for frying
Directions
Marinate the Chicken
In a medium bowl, combine egg, cornstarch, oil, soy sauce, salt, and white pepper. Add chicken and toss to coat evenly.
Cover and refrigerate 20 minutes.
Build and Thicken the Sauce
In a saucepan over medium heat, warm 1 tbsp (15 ml) oil. Add ketchup and cook 30 seconds to lightly deepen flavor.
Add chicken broth (replacing up to 1 cup / 240 ml with mango juice if using), seasoned rice vinegar, unseasoned rice vinegar, sugar, soy sauce, MSG, salt, the sliced onion (for infusion), garlic, and ½ cup (120 ml) reserved pineapple juice.
Bring to a boil, then reduce to a steady simmer. Simmer 5–7 minutes until onions soften and flavors infuse.
Strain into a clean saucepan and discard solids. Return to a full simmer.
Whisk cornstarch with cold water, stir into the simmering sauce, and boil 60–90 seconds until glossy and spoon-coating. Taste and adjust with vinegar or salt if needed. Hold warm.
First Fry
Heat oil to 360°F (182°C); it should drop to about 330–340°F (166–171°C) when chicken is added.
Remove chicken from marinade and allow excess to drip off. Lay chicken on a rack 3–5 minutes, then lightly toss with 1–2 tbsp (8–16 g) cornstarch.
Whisk batter ingredients together just until thick but pourable. Dip chicken, allowing excess batter to drip off.
Fry in batches 3½–4 minutes until pale golden. Drain on a rack in a single layer and rest 4–5 minutes.
Stir-Fry the Vegetables
In a wok or large skillet over high heat, add 1–2 tbsp (15–30 ml) oil.
Add the onion strips and bell peppers. Sprinkle with ½ tsp sugar and stir-fry 60–90 seconds until slightly tender but still crisp.
Turn off heat and set aside.
Second Fry
Increase oil to 385–390°F (196–199°C).
Fry chicken 45–60 seconds until deep golden and crisp.
Check several of the largest pieces from each batch with an instant-read thermometer; the chicken should register 165°F (74°C) before serving.
Drain on a rack in a single layer (do not stack while hot). Lightly sprinkle with a small pinch of salt while hot (optional).
Finish and Serve
While chicken finishes, add the thickened sauce to the vegetables. Stir in pineapple chunks and fold in tomato wedges last. Warm gently just until heated through.
Serve chicken on a tray, sauce in a bowl, and rice separately so everyone can spoon as much sauce as they like.
Yield: 4 servings.
Notes
Preparation
- Measure ½ cup (120 ml) pineapple juice for consistent balance. If using more, add 1–2 tbsp (15–30 ml) extra unseasoned rice vinegar to maintain brightness.
- Rest chicken between fries and avoid stacking while hot to preserve crispness.
- Use very cold water for the batter and avoid overmixing.
Variations
- Mango: Replace up to 1 cup (240 ml) of broth with mango juice for subtle fruit depth.
- Lighter Crust: Substitute club soda for the batter water.
Serving Suggestions
- Serve with steamed jasmine rice.
- Keep chicken and sauce separate until serving for best texture.
Make-Ahead & Storage
- Sauce can be made up to 2 days ahead and reheated gently.
- Store chicken and sauce separately; re-crisp chicken in a 400°F (204°C) oven or air fryer.





