Slow Cooker Tomato Herb Chicken

This Slow Cooker Tomato Herb Chicken is tender, savory, and full of rich tomato, garlic, and herb flavor. Boneless chicken cooks gently in a rustic tomato sauce with onions, garlic, basil, oregano, thyme, and a little chicken broth until the meat is juicy and the sauce is deeply flavorful.

It is an easy slow cooker dinner that works beautifully over pasta, rice, mashed potatoes, polenta, or crusty bread. The recipe uses simple pantry ingredients and requires very little hands-on work, making it perfect for busy weekdays, meal prep, or cozy family dinners.

Why You Will Love This Recipe

This dish has the comfort of a slow-cooked Italian-style chicken dinner without requiring a complicated sauce. Tomatoes provide acidity and richness, while garlic and dried herbs create plenty of flavor as the chicken cooks.

Chicken thighs are especially tender in the slow cooker, but chicken breasts also work well when you avoid overcooking them.

The recipe is also easy to customize with mushrooms, spinach, olives, Parmesan, red pepper flakes, or extra vegetables.

Ingredients

2 pounds boneless, skinless chicken breasts or chicken thighs
1 can crushed tomatoes, 28 ounces
1 small yellow onion, diced
4 cloves garlic, minced
1/2 cup low-sodium chicken broth
1 tablespoon tomato paste
1 teaspoon dried basil
1 teaspoon dried oregano
1/2 teaspoon dried thyme
1/2 teaspoon garlic powder
1/2 teaspoon onion powder
1/2 teaspoon paprika
1/2 teaspoon black pepper
1/2 teaspoon salt, or to taste
1 tablespoon olive oil
1 teaspoon Worcestershire sauce, optional
2 tablespoons chopped fresh parsley or basil, optional
Freshly grated Parmesan for serving, optional

Ingredient Notes

Chicken: Boneless thighs stay especially juicy during slow cooking. Chicken breasts create a leaner meal but should be checked earlier so they do not become dry.

Crushed tomatoes: Crushed tomatoes create a smooth but still rustic sauce. Diced tomatoes can also be used if you prefer more texture.

Tomato paste: A small amount adds depth and makes the sauce taste richer without needing a long simmer on the stovetop.

Herbs: Basil, oregano, and thyme create a classic tomato-herb flavor. Italian seasoning can replace the individual herbs if needed.

How to Make Slow Cooker Tomato Herb Chicken

Lightly grease the inside of the slow cooker.
Place the thawed chicken in a single layer.
Season with garlic powder, onion powder, paprika, salt, and black pepper.
Scatter the diced onion and minced garlic over the chicken.
In a bowl, stir together the crushed tomatoes, chicken broth, tomato paste, basil, oregano, thyme, olive oil, and optional Worcestershire sauce.
Pour the tomato mixture evenly over the chicken.
Cover and cook on low for four to six hours or on high for two to three hours.
Begin checking near the earliest cooking time, especially when using chicken breasts.
The chicken is ready when the thickest portion reaches 165°F.
Transfer the chicken briefly to a clean plate if you want to stir the sauce more easily.
Stir the tomato sauce well and taste for seasoning.
Return the chicken to the slow cooker and spoon the sauce over the top.
Garnish with fresh parsley or basil and optional Parmesan before serving.

How to Make the Sauce Thicker

The tomato sauce naturally thickens as it cooks, but some chicken releases more moisture than others.

If the sauce is thinner than you prefer, remove the cooked chicken and leave the slow cooker uncovered on high for 15 to 20 minutes.

You can also mix one tablespoon of cornstarch with one tablespoon of cold water and stir it into the hot sauce. Cook on high for another 10 to 15 minutes until thickened.

If the sauce becomes too thick, add a small splash of chicken broth.

Tips for Tender Chicken

Start with fully thawed chicken rather than placing raw frozen poultry directly in the slow cooker.

Do not cook chicken breasts much longer than necessary. They are lean and can dry out if left cooking long after reaching 165°F.

Chicken thighs are more forgiving and are a good choice when you want especially tender meat.

Use an instant-read thermometer rather than relying only on cooking time because slow cookers vary significantly.

Optional Browning Step

Browning the chicken before slow cooking is not required, but it adds extra flavor and a more attractive appearance.

Heat one tablespoon of olive oil in a skillet over medium-high heat and sear the seasoned chicken for about two minutes per side.

Transfer it to the slow cooker and continue with the recipe. The chicken does not need to be fully cooked during the searing step.

Easy Variations

For tomato mushroom chicken, add eight ounces of sliced cremini mushrooms with the onions.

For spinach tomato chicken, stir two cups of baby spinach into the sauce during the final 10 minutes.

For creamy tomato herb chicken, stir in four ounces of softened cream cheese or one-half cup heavy cream near the end.

For Mediterranean-style chicken, add sliced olives and a little crumbled feta before serving.

For spicy tomato chicken, add crushed red pepper flakes or a pinch of cayenne.

For extra vegetables, add bell peppers, zucchini, or carrots depending on how soft you want them to become.

Can You Shred the Chicken?

Yes. Once the chicken reaches 165°F and is tender, shred it with two forks and stir it directly into the tomato sauce.

Shredded tomato herb chicken works especially well over pasta, rice, baked potatoes, polenta, or toasted bread.

It can also be used as a filling for wraps, sandwiches, or meal-prep bowls.

What to Serve with Tomato Herb Chicken

Serve the chicken over spaghetti, penne, linguine, or egg noodles for an easy pasta dinner.

Mashed potatoes, rice, risotto, polenta, or couscous are also excellent because they soak up the tomato sauce.

For vegetables, try roasted broccoli, green beans, asparagus, zucchini, or a simple salad.

Crusty bread, garlic bread, or dinner rolls are perfect for collecting the extra sauce.

Make-Ahead Tips

The tomato sauce mixture can be prepared one day ahead and refrigerated in an airtight container.

The onion and garlic can also be chopped in advance to make assembly faster.

Keep raw chicken refrigerated separately until you are ready to start cooking.

Storage and Reheating

Store cooled leftovers in an airtight container in the refrigerator for up to three to four days.

Reheat gently in a covered skillet over medium-low heat or in the microwave until steaming hot.

If the tomato sauce thickens too much in the refrigerator, add a splash of chicken broth or water before reheating.

The cooked chicken and sauce can also be frozen for up to two months. Thaw overnight in the refrigerator before reheating.

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