This gluten free sweet and sour chicken has the sticky, tangy sauce and crispy edges you love from takeout, made in one pan at home.

The chicken pieces get a simple cornstarch coating, pan-fry until golden, then toss with a sauce that comes together in about five minutes. No deep fryer, no wheat, and all the sweet-and-tart flavor you want on a weeknight.

Why This Gluten Free Chicken Works

The sauce is balanced, not cloying. Rice vinegar cuts through the sweetness, and a little ketchup adds depth without tasting like a bottle of Heinz. The cornstarch coating fries up crisp and stays that way under the sauce.

It comes together fast too. By the time your rice is done, the chicken is golden and the sauce is bubbling. All you need is pantry cornstarch and tamari, no specialty gluten free flour blends.

Ingredients

1 1/2 lbs boneless skinless chicken thighs: cut into 1-inch pieces; breasts work too but thighs stay juicier.
3 tbsp cornstarch: plus 1 tablespoon more for the sauce, divided.
1/2 tsp kosher salt: plus a pinch for the sauce.
2 tbsp vegetable oil: or any neutral oil with a high smoke point.
1 red bell pepper: cut into 1-inch chunks.
1 green bell pepper: cut into 1-inch chunks.
1 cup pineapple chunks: fresh or canned in juice, drained well if canned.
1/4 cup pineapple juice: from the can or fresh.
3 tbsp rice vinegar: unseasoned.
3 tbsp gluten free tamari: or coconut aminos for soy-free.
2 tbsp ketchup: regular, not flavored.
3 tbsp brown sugar: light or dark, whichever you have.
Sliced green onions and sesame seeds: for serving.

Variations / Substitutions

Chicken breast: swap in 1 1/2 lbs breast, but cut cook time slightly and check for doneness early so it stays tender.
Tofu: use extra-firm tofu pressed, cubed, and coated the same way. Pan-fry until golden all over.
No bell peppers: broccoli florets or snap peas work well. Add them when you would the peppers, cooking just until bright green.
Spicier sauce: stir 1 to 2 teaspoons sriracha or a pinch of red pepper flakes into the sauce.
Soy-free: use coconut aminos in place of tamari. The sauce will be a little sweeter, so you can reduce the brown sugar by half a tablespoon.

If you like this, try my 20-Minute Gluten Free Orange Chicken for a different take.

How to Make Sticky Gluten Free Sweet and Sour Chicken

Step 1: Coat the Chicken

In a medium bowl, toss the 1 1/2 lbs chicken pieces with the 3 tbsp cornstarch and 1/2 tsp salt until every piece is evenly coated. Use your hands or a spoon, whichever you prefer.

The coating will look dry and powdery. That is exactly what you want. It turns into the crispy layer once it hits the oil.

Step 2: Sear the Chicken

Heat the 2 tbsp vegetable oil in a large skillet over medium-high heat. When the oil shimmers, add the chicken in a single layer. Let it cook undisturbed for about 4 minutes until the bottom is deep golden brown, then flip and cook another 4 minutes or so until cooked through. Work in batches if your pan cannot hold all the pieces in one layer without crowding.

The chicken should feel firm when you press it and have no pink inside. Transfer it to a plate and set it aside.

Step 3: Sauté the Peppers and Pineapple

Add the red and green bell pepper chunks plus the 1 cup pineapple to the same skillet. Cook for 2 minutes, stirring once or twice, just until the peppers begin to soften at the edges and the pineapple picks up a little color.

The pan is still hot and the vegetables will pick up some of the browned bits from the chicken. Scoop everything onto the plate with the chicken.

Step 4: Simmer the Sauce

In a small bowl, mix the remaining 1 tbsp cornstarch with 2 tbsp cold water to make a slurry. In the skillet, combine the 1/4 cup pineapple juice, 3 tbsp rice vinegar, 3 tbsp tamari, 2 tbsp ketchup, and 3 tbsp brown sugar. Stir and bring to a simmer over medium heat. Once it is bubbling, give the cornstarch slurry a quick stir and pour it in, whisking the whole time. Cook for about 1 minute until the sauce thickens.

The sauce will go from cloudy brown to glossy and thick enough to coat the back of a spoon. Taste it and add a tiny pinch of salt if it needs it.

Step 5: Toss and Serve Over Rice

Return the chicken, peppers, and pineapple to the pan. Toss everything with a spatula for about 30 seconds until the sauce clings to every piece. Spoon it right over steamed rice, scatter the green onions and sesame seeds on top, and serve while it is hot.

A Few Notes Before You Start

Use thighs if you can. Their extra fat keeps the meat juicy even if you leave the pan a minute too long. If you use breasts, pull them off the heat the moment they hit 165°F.
Don’t skip removing the chicken and vegetables before you make the sauce. If they sit in the pan when the liquid goes in, the coating turns gummy instead of staying crisp under the sauce.
Pat the chicken dry with paper towels before you toss it in cornstarch. Extra moisture steams the meat and prevents browning.
Double the sauce ingredients if you like plenty of sauce to soak into the rice. No other adjustments needed.

Keeping Leftover Chicken Fresh

Refrigerate: Store leftovers in an airtight container for up to 3 days. The chicken will lose some crispness but the flavor holds well.
Reheating: Warm it in a skillet over medium heat or in the microwave. A quick pan reheat will bring back a little of the crust.

What to Serve With Sticky Gluten Free Sweet and Sour Chicken

Steamed jasmine rice is the obvious partner because it soaks up all the extra sauce. A simple cucumber salad with rice vinegar and a pinch of sugar works nicely on the side, adding a cool crisp contrast. For a green vegetable, steamed broccoli or sautéed bok choy both handle the sweet-sour sauce without fighting it.

Frequently Asked Questions

Can I use bone-in chicken for this recipe?

Bone-in pieces are not ideal here. They take much longer to cook through and the coating can burn before the meat is done. Stick with boneless cuts for the best texture and timing.

Can I freeze leftover gluten free sweet and sour chicken?

Yes, though the coating will soften. Cool the dish completely, then transfer to a freezer-safe container and freeze for up to 1 month. Thaw overnight in the fridge and reheat in a skillet.

Why did my sauce turn out lumpy?

Lumps form when the cornstarch slurry is not fully mixed with cold water or when it is poured into a sauce that is not yet bubbling. Whisk the slurry right before you add it, and make sure the liquid is simmering while you whisk.