This slow cooker chicken cacciatore is a rich, tomato-based Italian stew made with chicken thighs, kalamata olives, mushrooms and rosemary. It's an easy, dump-and-go dinner that doubles as a seriously good meal prep because the flavours deepen overnight and it reheats well.

If you've been around here lately, you'll know I'm in my slow cooker recipe era. I originally created this as a casserole dish recipe, and it was good - but once I tested it in my slow cooker, I was obsessed. There's something about being able to sear, dump, walk away and come back to a rich, tomatoey, olive-packed chicken cacciatore that just makes sense for a meal prep.
I even made this as a gym meal prep once and so many people told me they'd "never cook something like this at home." Challenge accepted. Because this is stupid easy, wildly flavourful and exactly the kind of winter-inspired meal prep that will change your mind.
TL;DR
- Prep time: 15 minutes Cook time: 4 hours (high), 6 hours (low)
- Meal prep: It's balanced and hearty, plus the flavours get better the next day.
- Fridge storage: 4 days (store rice separately or on opposite side of container where possible)
- Freezer storage: 6 months (without rice or separately)
- Reheating: Microwave or stove top with a splash of water / broth.
- Customise: Swap boneless thighs for bone-in, adjust olives (or omit), add extra veg, swap up the serving with pasta, mashed potatoes or bread.
Jump to:
Why you'll love this recipe
Rich and flavourful. The combination of kalamata olives with stewed tomatoes creates a deep, savoury flavour that's hard to beat. If you're a fan of olives, you need to try my Mediterranean chicken rice bowl
Like a big hug. It's perfect for a winter-inspired meal prep alongside my slow cooked beef goulash when you want variety without changing your grocery list too much.
Meal prep friendly. The flavours mature overnight which means it actually tastes better the next day, and it's freezer-friendly too.
Slow cooker. Everything is done in one pot, making it ideal for a lazy meal prep - similar to my slow cooker beef and noodles when you want minimal effort.
Ingredients

Chicken thighs. I've tested this with both bone-in and boneless chicken thighs. The bones add richness and help the meat hold structure during slow cooking, but I personally prefer boneless thighs for meal prep because I don't want to deal with bones when I'm eating with just a fork.
Kalamata olives. Kalamata olives bring a deeper, fruitier flavour than standard black olives. I recommend buying them already pitted for ease - and don't be afraid to add in the brine from the jar directly into the slow cooker.
Tomatoes. You can use fresh tomatoes, or use store-purchased passata and diced tomatoes (depending what is in season and you have access too).
Worcestershire sauce. My secret weapon in dishes like spaghetti bolognese and curried savoury mince. It's not traditional, but it does add acidity (like wine in typical cacciatore dishes) and it takes this chicken cacciatore from good to "what did you put in this?"
Fresh rosemary and bay leaf. Fresh herbs infuse the sauce slowly and deeply. Dried works in a pinch, but fresh gives a cleaner, more aromatic finish.
Please check the recipe card for full list of ingredients and quantity. See below for substitutions and variations.
Substitutions and variations

How to make slow cooker chicken cacciatore

Step 1: If using a searing slow cooker, heat olive oil and sauté onion (and garlic if adding) until softened.
If you don't have a searing slow cooker, you can do this in a large pan over the stove instead.

Step 2: Brown chicken thighs on both sides for added flavour.

Step 3: Add passata, diced tomatoes, Worcestershire sauce, olives, rosemary and bay leaves. Cook on high for 4 hours or low for 6 hours.

Step 4: With 30 minutes left, discard rosemary and bay leaves. Add mushrooms and sugar. At this point, start your rice if serving with rice.
If it's not thick enough for your liking (and you're serving straight away), mix 1 tablespoon corn starch with 2 tablespoon water and stir into the sauce. Leave lid off for approx. 20 minutes and you'll notice it starts to thicken.

Step 5: Serve over rice.

Lauren's Top Tips
Taste before serving.
Adjust salt depending on how salty your olives are.
Don't skip the sear.
Even in a slow cooker, browning adds a huge flavour boost.
Add mushrooms later.
Adding them in the last 30 minutes prevents them from going rubbery.
How to cook chicken cacciatore in a casserole?

Sear chicken thighs in a Dutch oven, remove and sauté vegetables for 5 minutes.
Add vinegar to deglaze, scraping up the brown bits from the bottom. Then, add tomatoes, olives and herbs.
Return chicken, cover and bake at a low temperature for 1-3 hours between 120-160°C / 250-320°F (the lower you cook it, the longer it'll take and more tender it will be) until chicken reaches 70°C / 165°F and sauce thickens.
Remove herbs before serving and as above, you can cook the rice (or other carby element) in the last 30 minutes.
Meal prepping chicken cacciatore
This slow cooker chicken cacciatore is an ideal meal prep option because it's balanced with protein from chicken thighs, carbs from rice and vegetables from mushrooms, carrots and tomatoes.
If you're after another starchy option, it also pairs well with pasta, mashed potatoes or even slices of bread (like my small batch focaccia).

Storing
Store the chicken cacciatore soup in airtight containers in the fridge for up to 4 days. If storing with rice or pasta, I would recommend storing on opposite sides of the container so the rice or pasta don't continue to soak up the flavour (as it could end up a bit mushy due to the liquid).
This is a slightly runnier dish so there will be some leakage into the rice, but it's not so much that will cause the texture to diminish considerably. However, it will thicken in the fridge!
Reheating
Microwave. Heat on high for 2-3 minutes then stir and reheat for a further 1-2 minutes until fully warmed.
If reheating with the rice, add a tablespoon of water or an ice cube before microwaving to prevent dryness.
Stove-top. Add to the chicken cacciatore (not the rice) to a saucepan over medium heat with a couple of tablespoon extra water or broth to loosen the sauce.
Gently heat for 5-8 minutes, stirring occasionally until you see a slight bubble.

Freezing
This dish batch cooks really well and will freeze for up to 6 months because the sauce covers the chicken helping to trap moisture. I don't recommend freezing with the rice as it is a very saucy dish and will impact the texture of the rice.
Let it cool at room temperature for up to 2 hours and transfer to a freezer-safe container, ziplock or souper cubes.
Make sure the containers or storage are just big enough to fit the chicken to prevent freezer burn as much as possible.
Thaw in the fridge overnight before reheating, and note that the texture may slightly change, but the flavours will remain delicious.
If you want more meal prep information, check out my Meal Prep for Beginners post and my Meal Prep Basics E-Book.

FAQs
Slow cookers naturally trap steam, which creates extra liquid. If your chicken cacciatore sauce is too thin, remove the lid for the final 20-30 minutes on high or simmer on the stovetop to reduce. You can also stir in a cornstarch slurry for a thicker finish.
If your chicken cacciatore sauce is too thin, you can remove the lid during the last 20-30 minutes of cooking to let it reduce, or stir in a cornstarch slurry (1 tablespoon cornstarch mixed with 1 tablespoon water) for a thicker consistency.
Tomato-based dishes can taste sharp if not balanced properly. The combination of sugar and Worcestershire sauce helps balance acidity in this recipe - but if needed, add a small pinch of sugar or a splash of olive brine to round it out.
Other slow cooker recipes
Or, you can have a browse through my meal prep slow cooker meals for more delicious eats.
I hope you enjoy this as much as I do - Love & Pasta, Lauren x

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Recipe

Chicken Cacciatore Soup (Chicken Tomato Stew)
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Equipment
- slow cooker, with searing function (optional)
Ingredients
- 1.5 kg (3 ⅓ lb) chicken thighs , boneless, approx. 8
- 1 onion,
- 4 cloves garlic
- 6 carrots,
- 300 g (2 cups) kalamata olives, subs note 1
- 500 g (1 lb) mushrooms, button
- 700 g (3 cups) passata
- 400 g (14 oz) diced tomatoes, subs note 2
- 1 tablespoon worcestershire, subs note 3
- 1 tablespoon white sugar
- 1 sprig rosemary, fresh recommended, see note 4
- 4 bay leaves, fresh recommended, see note 4
Rice (cooked your way, or see my post for top tips)
- 400 g (1 cups) rice, yields 6 cups cooked
Instructions
Preparation
- Dice: 1 onion and 4 cloves garlicSlice: 6 carrots, 500 g (1 lb) mushrooms to desired consistency
Cook
- In the slow cooker on a searing function (or on the stove) gently saute onion and garlic for 2 minutes.
- Add 1.5 kg (3 ⅓ lb) chicken thighs and brown for 1 minute each side
- To the slow cooker add the onion, garlic and chicken (if cooked on the stove) then add: carrots, 300 g (2 cups) kalamata olives, 700 g (3 cups) passata, 400 g (14 oz) diced tomatoes, 1 tbsp worcestershire, 1 sprig rosemary, 4 bay leaves. Stir and cook on high for 4 hours or low for 6 hours.
- With 30 minutes left, remove rosemary and bay leaves and add mushrooms and 1 tbsp white sugar. Taste the sauce and adjust as necessary (too acidic? Add more sugar)See note 5 if you plan on eating straight away and want it thicker. For meal prep, it'll naturally thicken in the fridge.
- At this time, you can also begin to prepare your 400 g (1 cups) rice. You can do this however you like, or you can follow some of my tips & tricks for cooking rice.


















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I couldn’t leave without mentioning how much I enjoyed your content. I’ll be back to check out your new posts regularly. Keep up the awesome work!
athletelunchbox
Thank you so much for your kind comment! I am aiming to get lots of new recipes up so please keep in touch and let me know what you think 🙂