Slow Cooker Sweet and Sour Chicken

If you're craving that sticky, tangy, and sweet takeout flavor but want a healthier, cheaper, and mostly hands-off version, this Slow Cooker Sweet and Sour Chicken is your answer. It's a "dump-and-go" dinner hero that transforms simple pantry staples into a vibrant, crowd-pleasing meal.

Love Slow Cooker Recipes? Try Slow Cooker BBQ Chicken Thighs and Slow Cooker Chipotle Honey Chicken next.

Skip the deep fryer, the take out and the delivery fees. This guide covers everything from achieving the perfect sauce consistency to swapping ingredients you already have in your cupboard.

You might also like Slow Cooker Apricot Chicken Thighs and Slow Cooker Chipotle Chicken.

Easy Slow Cooker Sweet and Sour Chicken

This Slow Cooker Sweet and Sour Chicken is a fresh take on the classic dish, but without the heavy breading and frying. Tender chunks of chicken simmer in a homemade sweet and sticky sauce (very similar idea as in Sweet and Salty Chicken).

Bell peppers, onions and pineapple chunks add a vibrant crunch and keep everything balanced.  It's the perfect easy dinner when you're craving takeout. Perfect with Pineapple Salsa and Balsamic glaze.

Why This Recipe Works

• Set It & Forget It: Perfect for busy weekdays.
• Healthier Fakeaway: No deep frying or heavy batter.
• Customizable: Easily adapted for gluten-free or extra-veggie preferences.
• Family Friendly: The balance of sweet pineapple and savory soy sauce is a hit with kids and adults alike.

Recipe Ingredients

This is an overview of ingredients, exact measurements are in the recipe card below.

Proteins & Veggies

• Chicken: You can use boneless, skinless breasts for a leaner option, but chicken thighs are highly recommended for slow cooking. They stay juicy and tender over long cook times, whereas breasts can dry out if overcooked.
• Bell Peppers: A mix of red, yellow, or green peppers adds crunch and color. Tip: We add these later in the cooking process to keep them from turning to mush.
• Onion: A standard yellow or white onion provides a savory base aromatic.
• Pineapple Chunks (Canned): You need both the fruit and the juice. The enzymes in pineapple help tenderize the chicken, and the juice is the base of your sweet and sour sauce.
• Cornstarch: The critical thickener. Without this, your sauce will be watery.

The Sauce Essentials

• Light Soy Sauce: Provides the salty, savory "umami" backbone.
• Apple Cider Vinegar: The "sour" in sweet and sour. It cuts through the sugar and balances the dish.
• Brown Sugar: Gives the sauce its rich, dark color and sticky caramel sweetness.
• Ketchup: Adds depth, color, and a hint of acidity.
• Garlic & Ginger: Fresh is best for a punchy flavor, but paste works in a pinch.
• Salt & Pepper: To season the chicken before cooking.
• Garlic, ginger

How to make Sweet and Sour Chicken in the Slow Cooker

Step 1: Prep the Chicken

Add chicken to the bowl with salt, pepper and corn starch and mix well.

Step 2: Brown the Chicken

Heat a large skillet over medium-high heat and pour in the vegetable oil. Add the chicken and allow the pieces to sear for 2-3 minutes undisturbed. Do not cook the chicken.

Step 3. Add Chicken to Slow Cooker

Once the chicken has browned, place it into the slow cooker.

Step 4. Prep Sweet and Sour Sauce

In a mixing bowl, whisk together the pineapple juice, apple cider vinegar, honey, ketchup, soy sauce, brown sugar, garlic and ginger.

Step 5. Pour Sauce into Slow Cooker

Pour over the chicken, covering evenly. Place the lid on and cook for 2-3 hours on high or 4-5 hours on low.

Step 6. Add the Veggies

About 30 minutes before serving, add the red and green bell peppers, onion and pineapple chunks to the slow cooker. Gently stir to combine. If you like your sauce thicker, you can add a cornstarch slurry and gently mix in. (1 tablespoon water and 1 tablespoon cornstarch stirred until liquid). The sauce will thicken on its own more when it's off heat.

Serve the sweet and sour chicken and veggies right away. You can add some chopped green onions and sesame seeds on top if you would like. Serve over rice or noodles.

Equipment

Large skillet, a 6-quart slow cooker, mixing bowls.

Why Is My Sauce Too Watery?

Slow cookers trap steam, meaning liquid doesn't evaporate as it does on a stove.

• The Slurry Fix: You must thicken the sauce at the end. Mix 3 tablespoon cornflour (cornstarch) with 2-3 tablespoon of the hot cooking liquid in a separate bowl until smooth, then stir it back into the pot.
• The "Lid-Off" Trick: If the sauce is still too thin after adding the slurry, remove the lid and cook on HIGH for the final 30-45 minutes to encourage evaporation.

Why Are My Peppers Mushy?

Vegetables cook much faster than meat. If you add peppers at the start of the 5-hour cook time, they will disintegrate.

• The Fix: Add the peppers only during the final 30 minutes of cooking. This ensures they stay crunchy and vibrant rather than turning into a soggy mash.

Why Does The Chicken Taste Dry?

Chicken breast is lean and can dry out easily, even in liquid.

• The Fix: Switch to boneless, skinless chicken thighs. They have a higher fat content that keeps them juicy during long slow cooks. If you must use breasts, cut them into larger chunks (2 inches) rather than small bites to prevent overcooking.

Can I put frozen chicken directly in the slow cooker?

It is generally not recommended for food safety reasons. Frozen chicken keeps the temperature in the "danger zone" (40°F-140°F) for too long, allowing bacteria to multiply. Always thaw chicken in the fridge before adding it to the slow cooker.

Can I double this recipe?

Yes, but do not double the liquid. Slow cookers generate liquid during cooking. If you double the chicken and veggies, only increase the sauce ingredients (soy sauce, vinegar, juice) by about 1.5x, not 2x, or you will end up with chicken soup.

How do I store and freeze leftovers?

• Fridge: Store slow cooker sweet and sour chicken in an airtight container for up to 3 days. The sauce will thicken significantly in the fridge; add a splash of water when reheating.
• Freezer: Freeze completely cooled leftovers for up to 3 months. Thaw overnight in the fridge before reheating on the stove or microwave.

Can I make this on the stove instead?

Yes. Brown the chicken in a pan first, remove it, then simmer the sauce ingredients until thickened. Return the chicken and add veggies, cooking for 10-15 minutes until tender-crisp. You will need to add a splash of water as the sauce will reduce much faster on the stove than in a slow cooker.

Storage Instructions

Place leftover chicken into an airtight container and refrigerate for up to 3 days. Reheat in the microwave or on the stove until heated through.

Can I eat this warm or cold?

This Slow Cooker Sweet and Sour Chicken is best served hot, right after cooking. 

Tips for Success

• Feel free to add or subtract any veggies that you like. Some other good options include snap peas, broccoli or zucchini.
• If you would like a really crispy chicken, you can place the chicken and veggies on a baking sheet and broil for 2-3 minutes until the chicken has gotten crispy and a nice glaze forms.
• You can sprinkle some crushed red peppers over the top if you want to balance some of the sweetness.
• Check your chicken and gently stir it while it is cooking. If it is so tender that it starts to fall apart, it is definitely ready. Searing will help keep its shape, so don't skip this step.

Serving Suggestions

I love this dish served over rice but you can also serve over rice noodles or even cauliflower rice (or with Bang Bang Cauliflower) for a lighter option.

Serve your sticky sweet and sour chicken over:

• Steamed Jasmine or Basmati Rice
• Egg Fried Rice
• Rice Noodles or Chow Mein Noodles
• Garnished with fresh green onions and sesame seeds for that restaurant-quality finish.

Variations & Substitutions

• Gluten-Free: Swap the soy sauce for Tamari or Coconut Aminos. Ensure your cornstarch is certified GF.
• Vegetarian: Swap chicken for firm tofu (add in the last hour) or chickpeas. Use a vegetarian Worcestershire sauce if adding extra savory depth.
• Spicy Kick: Add a pinch of red pepper flakes or a teaspoon of Sriracha to the sauce mix.
• No Alcohol: Apple Cider Vinegar is a great substitute for White Wine Vinegar.

Storage & Reheating

• Fridge: Store leftovers in an airtight container for up to 3 days. The sauce will thicken further as it cools.
• Freezer: Freeze completely cooled leftovers for up to 3 months.
• Reheating: Thaw overnight in the fridge. Reheat in a saucepan on the stove or in the microwave. Add a splash of water if the sauce has become too gelatinous.

More slow cooker recipes

• Easy Slow Cooker Pot Roast
• Slow Cooker Sweet Creamed Corn
• Slow Cooker Brisket in BBQ Sauce