Slow Cooker Balsamic Chicken with Peppers
Chicken thighs slow cooked with sweet red peppers, onion and a quarter cup of balsamic vinegar.
Why You'll Love This Recipe
A quarter cup of balsamic sounds like a lot until you understand what five hours under a lid does to it. The sharpness cooks off almost entirely and what stays behind is dark, faintly sweet and glossy, closer to a glaze than a vinegar. It coats the chicken and the peppers and it is the reason this pot looks like it took far more effort than it did.
The peppers are cut into wide strips rather than diced on purpose. Diced peppers vanish into the sauce, and I wanted something you can actually pick up with a fork. Over five hours they go completely soft and sweet while staying in recognizable pieces, which gives the bowl two textures instead of one. The same logic applies to the onion, so cut it into wedges through the root rather than slicing it thin, and the layers will hold together instead of dissolving.
This is the one on the list I make when there is nothing in the house and no time to think. It is fifteen minutes of slicing, everything goes in raw, and the only thing left to do at the end is tear basil over the top. Some nights that is the entire ambition. It also reheats better than most chicken dishes, since the thighs sit in their own sauce and do not dry out the way breast meat would.
Ingredients
- 2 1/2 lb boneless skinless chicken thighs
- 3 red bell peppers, cut into wide strips
- 1 large red onion, thinly sliced
- 5 garlic cloves, thinly sliced
- 3/4 cup crushed tomatoes
- 1/4 cup balsamic vinegar
- 2 tbsp tomato paste
- 3/4 cup low-sodium chicken broth
- 1 tbsp olive oil
- 2 tsp dried oregano
- 2 tsp fresh thyme leaves
- 1/2 tsp salt
- 3/4 tsp black pepper
- 1/2 cup torn fresh basil, for serving
Instructions
- Season the chicken: Pat the chicken thighs dry and toss them with the black pepper, oregano and half the thyme. Drying the surface first is what keeps the seasoning on the meat rather than in the bottom of the pot.
- Layer the vegetables: Scatter the sliced onion, garlic and pepper strips across the bottom of a 6-quart slow cooker, then lay the chicken thighs over them in as close to one layer as you can.
- Make the sauce: Whisk the crushed tomatoes, tomato paste, balsamic vinegar, chicken broth, olive oil and salt together in a bowl until the paste is fully worked in and no streaks remain.
- Pour it in: Pour the sauce evenly over the chicken. Unlike most of the pots on this site, you do want this one over the top rather than around the edges, because the glaze is meant to coat the meat.
- Cook it low: Cover and cook on low for 5 hours. It is ready when the chicken pulls apart easily and the peppers have gone completely soft. Thighs are forgiving, so an extra half hour will not hurt anything.
- Reduce and serve: If the sauce is thinner than you want, leave the lid ajar for the last 30 minutes and it will tighten up. Stir in the remaining thyme, tear the basil over the top and serve.
Variations
- Instant Pot: Cook on high pressure for 10 minutes with a natural release of 10, then simmer uncovered on saute for a few minutes to tighten the sauce.
- With olives: Add a half cup of pitted kalamata olives at the start. They bring salt and brine that play well against the sweetness of the balsamic.
- With mushrooms: Add 8 oz of quartered cremini at the start. They soak up the glaze and give the pot a deeper, earthier base.
- Over vegetables: Serve it over roasted spaghetti squash or zucchini ribbons. The sauce is thick enough to cling rather than pool at the bottom of the plate.
- With rosemary: Swap the thyme for a teaspoon of chopped fresh rosemary. It is a stronger herb and takes the dish somewhere more wintry.
Storage & Leftovers
Cooled leftovers keep in the refrigerator for 4 days. Keep the chicken sitting in the sauce, because that glaze is most of what you cooked for and it is what keeps the meat from drying at the edges.
Reheat gently in a covered pan over medium-low. The sauce reduces further as it reheats, which is not a problem, but add a splash of broth if it goes past glossy and into sticky.
It freezes for up to 3 months. Freeze the chicken and peppers together with all the sauce, thaw overnight in the refrigerator and reheat covered. The peppers come out softer than they went in, which suits this dish fine.
Notes & Tips
- Cut the peppers wide: Half-inch strips hold together over five hours. Diced peppers disappear into the sauce entirely and you lose the best texture in the pot.
- Whisk the sauce separately: Tomato paste dropped into a full crock stays in a lump. Thirty seconds in a bowl with the vinegar and broth gets it smooth.
- Use ordinary balsamic: Expensive aged balsamic is wasted in a long cook. What you want here is the everyday bottle, and a quarter cup of it.
- Sauce goes over the top: This is the exception to the usual slow cooker rule. Pouring it over the chicken is how the glaze ends up on the meat instead of under it.
- Lid ajar to thicken: Peppers and chicken release a lot of liquid. Thirty minutes with the lid cracked at the end turns a thin sauce into a glossy one.
- Basil at the table: Torn basil dropped into a hot pot goes black within a minute. Scatter it over individual bowls instead and it stays green and perfumed.
Nutrition & Mindful Eating
- Chicken, sweet peppers and balsamic are a very short ingredient list doing a lot, and the reason it works is that each one is sweet or savory in a different register. The peppers go sugary, the balsamic goes dark and syrupy, and the chicken keeps both of them anchored.
- Red bell peppers hold more vitamin C than an orange does, gram for gram, and they are what turn this pot sweet without anything sweet being added to it.
- Chicken thighs bring more iron and zinc than breast meat, and their fat is what lets them sit under a lid for five hours and come out tender rather than stringy.
- The tomatoes and the olive oil are working together here, because the lycopene in cooked tomato is far easier for your body to take up when there is fat in the same pot.
- Oregano, thyme and basil are carrying the seasoning in a dish with only half a teaspoon of salt, and the basil added raw at the end gives a lift that the cooked herbs cannot.
- As you eat, notice how the sweetness of the pepper and the depth of the balsamic keep trading places, and let the basil finish each bite.
Frequently Asked Questions
Can I use chicken breast?
You can, and I would cut the time to about 3 1/2 hours on low. Breast has very little fat to protect it over a long cook and the balsamic will not save it from going dry.
Does the vinegar taste strong?
Not by the end. Five hours mellows it completely and what remains reads as dark and slightly sweet rather than sharp. If you want the sharpness back, add a teaspoon more off the heat.
What kind of balsamic should I use?
An ordinary supermarket balsamic is right here. Save the thick aged kind for drizzling, since its character cooks away in a pot like this and it costs many times more.
Can I add other vegetables?
Yes. Mushrooms, zucchini and cherry tomatoes all work. Add zucchini in the last hour so it does not fall apart, and everything else at the start.