Slow Cooker Italian Red Pepper Chicken

By Updated on

This easy Slow Cooker Italian Red Pepper Chicken is made with just a few ingredients you likely already have on hand and couldn't be more delicious.

236 CAL 15g CARBS 2g FAT 34g PROTEIN 0

This Crockpot Italian Red Pepper Chicken is simple, packed with flavor, and versatile. Serve it over pasta or rice, in a sandwich with melted cheese, layered on a pizza, or even scrambled into your morning eggs.

For a long time, I have been making this Slow Cooker Tomato Balsamic Chicken dish on the regular to have for quick and easy weeknight dinners, but lately, I have been looking to kick up the recipe a bit as I have been craving all things spicy.

Red pepper flakes were a no-brainer, but I also want to deepen the flavor of the sauce with something new and decided bell peppers were the perfect thing. With their sweet flavor, they balance out the red pepper flakes and black pepper perfectly.  They also add another vegetable component, which is always a win. 

The other key to building flavor in this recipe is the Italian seasoning and balsamic vinegar. The combination of dried herbs adds tons of flavor without needing to measure lots of different herbs and spices. The balsamic vinegar adds some sweetness and makes the dish taste rich and complex. 

Italian chicken with red peppers, spices, and chicken breast in a bowl with rice and Parmesan cheese.

Recipe Ideas and Tips

There are so many different ways to customize this recipe and make it your own. 

  • Make it creamy: Before serving this dish, consider adding some cream cheese to the slow cooker. Add it right to the pot and give it a good stir until it melts and transforms the sauce into something creamy and delicious. 
  • Leave out the spice: If you don't like things spicy, simply make this without the red pepper flakes. It will still have tons of flavor. 
  • Add extra veggies: Add some extra veggies to this recipe. You could add some kale at the beginning of cooking or stir in some spinach in the last ten minutes of cooking. Other options include green beans, zucchini, broccoli, cauliflower, or artichoke hearts. Since they all cook quickly, add them in the last 15 minutes of cooking so they don't overcook. 
  • Try different tomatoes: Switch up the flavors with different styles of diced tomatoes. Try Italian-style tomatoes, diced tomatoes with green chilies for something spicy, or garlic-infused diced tomatoes for extra garlicky flavor.
  • Use roasted red peppers: If you love the smoky flavor of roasted red peppers, swap them in for fresh red bell peppers. They will bring the same sweet pepper flavor with the added smokiness since it has been roasted.

What to Serve with Slow Cooker Italian Red Pepper Chicken

There are so many different side dish options when it comes to this simple chicken dish. Popular options include white or brown rice, quinoa, polenta, or pasta. Here are some other sides to consider:

Can this be made with chicken thighs?

This Slow Cooker Red Pepper Chicken dish works great with boneless skinless chicken thighs. It also can work with bone-in chicken breasts or thighs, but you will need to crisp up the skin under the broiler or in the oven after. 

For an alternative protein, this could be made with any type of lean pork including a tenderloin, trimmed pork shoulder, or pork roast.

How to make Crockpot Italian Chicken in the instant pot? 

To make this in the Instant Pot, start by sauteing the onions and red peppers in a touch of olive oil. Once tender, add the garlic and spices. Cook for one minute and add the remaining ingredients.

Close the instant pot. Cook the chicken for 10 minutes and then naturally release it. Taste and season with salt and pepper.

Can this be made with roasted red peppers?

If you love a little bit of smoky flavor, this recipe is delicious with roasted red peppers in place of red bell peppers. The roasted peppers will add a sweet flavor with some smokiness since it was roasted and charred.

This will work with either roasted red peppers packed in water, packed in oil, or homemade. When using roasted red peppers packed in oil, it will add some calories but also lots of flavor.

How to add more vegetables?

This meal works great with extra vegetables. When making it in the slow cooker, add quick-cooking vegetables in the last 20-30 minutes of cooking. This is true for veggies like spinach, zucchini, summer squash, or green beans.

For more slow-cooking vegetables like butternut squash or kale, add them to the meat at the beginning of the cooking process.

Red pepper chicken that was slow cooked with chicken breast, tomatoes, and red peppers in a bowl with Parmesan cheese.

The Recipe
Slow cooker red pepper Italian chicken in a bowl with cooked chicken breast, bell peppers, garlic over white rice.

Slow Cooker Italian Red Pepper Chicken

236 CAL 15g CARBS 2g FAT 34g PROTEIN 0
COOK TIME: 4 Hours
TOTAL TIME: 4 Hours, 5 Min
  • Print
  • Download
  • Send to your inbox


  • 2 lbs. boneless skinless chicken breast, chopped
  • 20 oz. canned diced fire roasted tomatoes
  • 3 red peppers, sliced
  • 1 sweet onion, sliced
  • 2 garlic cloves, minced
  • 2 tbsp. balsamic vinegar
  • 1 tsp. red pepper flakes (or more, optional)
  • 1 tsp. black pepper (more to taste)
  • 1 tsp. salt

Like this Recipe? Try our Meal Plans!

Slender Kitchen Meal Plans
  • Weekly Meal Plans
  • Easy Shopping List
  • Healthy, Low Carb, & Vegetarian
  • Nutritional Information


(Hide Media)

Switch to prevent your screen from going dark.


Add everything to the slow cooker and stir. Cook on low for 4 hours or until chicken is cooked through and tender.

Slow cooker filled with chicken breast, red peppers, onions, tomatoes, and herbs.

Check the chicken to make sure it is tender. Either slice or shred the chicken. Serve on its own or over your favorite grain.

Cooked red pepper chicken in a bowl with brown rice and bell peppers.
Nutritional Facts
Serving Size: 6 oz. (2/3 cup)
Amount Per Serving
Calories 236
Calories from Fat 15
% Daily Value *
Total Fat 2g
Saturated Fat 0g
Monounsaturated Fat 0g
Polyunsaturated Fat 0g
Cholesterol 74mg
Sodium 670mg
Total Carbohydrate 15g
Dietary Fiber 4g
Sugars 9g
Protein 34g

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Nutritional Values provided are estimates only and may vary based on the preparation method.

user image
About the author Meet Kristen McCaffrey
Hi, I’m the cookbook author, recipe developer, and food enthusiast behind Slender Kitchen. I am obsessed with making healthy food that is easy to prepare and absolutely delicious. Meal planning is my secret weapon and I hope I can make meal time easier for you with our tried and tested recipes and foolproof meal plans. Learn More
On Slow Cooker Italian Red Pepper Chicken
user image
user image
Margaret H.
May 16, 2023 - 17:53
Add a Rating:
Forgot to mention that my husband had his over Vigo yellow rice and loved the combo. I had mine plain because I eat low carb.
user image
Margaret H.
May 16, 2023 - 17:48
Thanks for this great recipe. I used thighs and two large peppers, one red and the other yellow. My husband asked me if I was sure I could find the recipe again because it’s definitely a keeper.
user image
Sandy Breese
January 6, 2020 - 07:28
Add a Rating:
This was super tasty! The entire family liked it. Served with the Creamy Spinach Polenta is a great pairing. Will definitely make again.
user image
Anne Zimmermann
March 15, 2018 - 07:42
Add a Rating:
Delicious! Quickly became a family favorite.
user image
March 21, 2017 - 19:16
I will need to have my slow cooker on for 8 hours - will that effect the recipe?
Instagram Icon
Did you make this?

Snap a picture and show us what you made on Instagram or Facebook. Tag us using @SlenderKitchen or #slenderkitchen.