Slow Cooker Creamy Tomato Basil Chicken Recipe

Name: Slow Cooker Creamy Tomato Basil Chicken
Prep time: 5 min
Cook time: 3 min
Total time: 3 min
Ingredients: 4 lb boneless, skinless chicken breasts (about 2 lbs); 1 can diced tomatoes with Italian herbs ((14 oz, with juice)); 1 cup marinara sauce; 3 cloves garlic (finely minced); 1/2 cup heavy whipping cream; 2 tbsp cornstarch; 1 tsp salt; 1 tsp Italian seasoning; 1/2 tsp dried basil; 1/4 tsp pepper; 2 tbsp fresh basil (finely chopped (for finishing))

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Golden, bubbling chicken swimming in a silky tomato-cream sauce that tastes like you fussed for hours—except you spent five minutes prepping and the slow cooker did the rest. This is the kind of easy crockpot chicken recipe that actually tastes special.

Why This Recipe Works

Minimal hands-on time: Five minutes of chopping and stirring, then walk away. The slow cooker transforms basic pantry staples into something that tastes restaurant-worthy.
Creamy without fussing: A cornstarch slurry whisked into heavy cream prevents curdling and gives you that silky, luxurious sauce without cream-based stress.
Flexible weeknight dinner: Serve over pasta, rice, or crusty bread—or skip the carbs entirely. Works for meal prep, busy families, and anyone who wants good crockpot recipes without the fuss.

Grocery List (& Shortcuts)

Main Players:

4 boneless, skinless chicken breasts (about 2 lbs)
1 can diced tomatoes with Italian herbs (14 oz, with juice)
1 cup marinara sauce
3 cloves garlic, finely minced
½ cup heavy whipping cream
2 tablespoons cornstarch
1 teaspoon salt
1 teaspoon Italian seasoning
½ teaspoon dried basil
¼ teaspoon pepper
2 tablespoons fresh basil, finely chopped (for finishing)
Grated Parmesan cheese (for serving)

Smart Shortcut: Pre-minced garlic from a jar saves you two minutes and tastes just as good here. No shame in that game.

Substitutions & Swaps:

Dairy-free: Use full-fat coconut milk or cashew cream instead of heavy cream. The flavor shifts slightly but stays creamy and delicious.
Lighter option: Swap half the heavy cream for Greek yogurt (stir it in at the very end to prevent curdling).
Fresh tomatoes: If you have them, use 2 cups fresh diced tomatoes plus ½ cup chicken broth instead of the canned tomatoes and marinara.

Step-by-Step

Prep (5 minutes)

Add the canned tomatoes with their juice, marinara sauce, minced garlic, salt, Italian seasoning, dried basil, and pepper to your 4- to 6-quart slow cooker. Stir everything together so the seasonings are evenly distributed.

Whisk the heavy cream and cornstarch together in a small bowl until smooth—this prevents lumps and helps the sauce thicken beautifully without breaking. Pour the cream mixture into the slow cooker and stir gently.

Cook (3 hours)

Place the chicken breasts into the sauce and press them down so they’re mostly submerged. Cover and cook on low for 3 to 4 hours. The chicken is done when a meat thermometer inserted into the thickest part reads 165°F—don’t skip this step. Overcooked chicken gets stringy; perfectly cooked chicken stays tender.

Finish

Stir in the fresh basil. Taste and adjust salt, pepper, or basil to your preference. Serve over pasta, rice, polenta, or with crusty bread to soak up every drop of that creamy sauce. Top with grated Parmesan and a crack of fresh pepper.

Scott’s Tips

Texture matters: Don’t skip the cornstarch slurry. It’s the difference between a thin, watery sauce and one that clings to the chicken and coats your pasta like it should. The cornstarch also keeps the cream from separating as it cooks.
Oops, it’s too thick? If your sauce reduces too much, stir in a splash of chicken broth or pasta water at the end. If it’s too thin, mix a teaspoon of cornstarch with a tablespoon of cold water and stir it in during the last 15 minutes of cooking.
Make-ahead shortcut: Prep everything except the chicken the night before—combine the tomatoes, sauce, garlic, and seasonings in a freezer bag. In the morning, thaw it (if you have time), add it to the slow cooker with the cream mixture and chicken, and go. Dinner’s waiting when you get home.

Storage & Leftovers

Fridge: Store in an airtight container for up to 4 days. The sauce actually deepens in flavor as it sits.

Reheating: Warm gently on the stovetop over medium heat, stirring occasionally, or microwave in a covered bowl, stirring halfway through. Add a splash of broth if the sauce has thickened too much.

Freezer: This freezes beautifully for up to 3 months. Freeze in individual portions or a large container. Thaw overnight in the fridge and reheat as above.

Can I use chicken thighs instead of breasts?

Absolutely. Thighs are actually more forgiving in the slow cooker and stay juicier. They’ll need the same 3 to 4 hours on low, but check the temperature—thighs are done at 165°F just like breasts.

What should I serve this with?

Pasta (penne, fettuccine, or rigatoni are perfect), creamy polenta, rice, mashed potatoes, or crusty bread. You could also serve it over zucchini noodles or spaghetti squash if you’re keeping it lighter.

Can I cook this on high instead of low?

Yes, but reduce the time to 1.5 to 2 hours. Watch it closely—high heat can dry out chicken faster. Low and slow is the safer bet for tender, juicy results.

Is this a healthy crockpot chicken recipe?

At 210 calories per serving, it’s reasonable for a creamy main course. If you’re looking to lighten it further, use half-and-half instead of heavy cream or swap in Greek yogurt at the end. The protein-to-calorie ratio is solid for a satisfying dinner.

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Save This Recipe & Tell Me How It Went!

This slow cooker creamy tomato basil chicken is the kind of recipe that makes weeknight cooking feel less like a chore and more like a win. Bookmark it, make it this week, and let me know how your family loved it. Drop a comment below—I’d love to hear what you served it with or how you made it your own. Get in, eat well, get out.