Slow Cooker Creamy French Mustard Chicken Recipe Everyone Will Love

Slow Cooker Creamy French Mustard Chicken takes just 15 minutes of prep time, followed by four effortless hours of slow cooking for a perfectly tender, flavor-packed dinner. This recipe is my go-to for busy evenings when I need a meal that feels sophisticated but doesn’t require babysitting the stove.

By letting the slow cooker do the work, you’ll get juicy chicken smothered in a creamy mustard sauce without any hassle. Trust me, this is one of those set-it-and-forget-it recipes that’s almost impossible to mess up. Perfect for feeding a crowd or meal prepping for the week!

Why This Slow Cooker Creamy French Mustard Chicken Is a Game-Changer

• Saves Time: Traditional mustard chicken recipes might have you hovering over a stove for 40 minutes. This version? Hands-off cooking so you can focus on other things.
• Max Flavor, Minimal Effort: The slow cooker locks in every bit of flavor from the mustard, thyme, and garlic, making the chicken impossibly delicious.
• Family-Friendly: The mild but zesty sauce hits that perfect balance—kids and adults both love it.
• Versatile: You can use chicken thighs or breasts, and the sauce pairs beautifully with everything from rice to roasted veggies.
• Meal Prep Friendly: Make ahead, refrigerate or freeze, and reheat when you need a fast dinner solution.

Equipment You’ll Need for This Slow Cooker Creamy French Mustard Chicken

To make this slow cooker chicken with mustard sauce, you’ll need just a couple of basic tools:

• Slow Cooker: Any 6-quart slow cooker (manual or programmable) will work. I recommend using the LOW setting for the best results.
• Whisk: You’ll need this for mixing the sauce ingredients and ensuring the mustard dissolves smoothly.
• Small Bowl: For whisking together the sauce before adding it to the slow cooker.

Bonus tip: If you’re trying to save counter space, a multi-cooker like the Instant Pot with a slow cooker setting works just as well!

Simple Ingredients for Slow Cooker Creamy French Mustard Chicken

This easy creamy mustard chicken recipe uses simple, fresh ingredients that you probably already have on hand:

• Chicken Breasts: Boneless, skinless chicken breasts work perfectly, but you can easily swap in chicken thighs for a juicier texture.
• Dijon & Coarse Mustard: The duo creates layers of flavor—a smooth tang from Dijon and a pop of texture from the coarse mustard seeds.
• Garlic & Thyme: These aromatics elevate the sauce, giving it that depth-of-flavor you’re craving.
• Heavy Cream: This is what transforms the sauce into a luscious, creamy dream. For a lighter option, you could substitute half-and-half.

Pro Tip: If you’re out of fresh garlic, pre-minced or garlic paste will save you even more prep time!

Slow Cooker Creamy French Mustard Chicken Recipe Details

• Servings: 8 persons
• Prep Time: 15 minutes
• Cook Time: 4 hours
• Total Time: 4 hours 15 minutes

Ingredients for Slow Cooker Creamy French Mustard Chicken

• 8 boneless, skinless chicken breasts
• 1 teaspoon salt
• 1/4 teaspoon ground black pepper
• 2 tablespoons Dijon mustard
• 2 tablespoons coarse mustard
• 3 cloves garlic, minced
• 1 teaspoon dried thyme
• 1 cup chicken stock
• 1 teaspoon honey
• 1 tablespoon lemon juice
• 2 tablespoons grated Parmesan cheese
• 2/3 cup heavy cream
• 1 tablespoon cornstarch
• 2 tablespoons water

How to Make Slow Cooker Creamy French Mustard Chicken

1. Season chicken breasts with salt and black pepper, then arrange them snugly in your slow cooker.
2. In a small bowl, whisk together Dijon mustard, coarse mustard, minced garlic, thyme, chicken stock, and honey. Pour this mixture over the chicken.
3. Set your slow cooker to LOW and cook for 4 hours, or until the chicken is fully cooked and tender.
4. Gently remove the chicken breasts from the slow cooker and set them aside on a plate.
5. Stir in the heavy cream, lemon juice, and Parmesan cheese to the sauce in the slow cooker.
6. In a small bowl, mix cornstarch and water to create a slurry. Slowly stir it into the sauce to thicken it. Turn the slow cooker to HIGH and let the sauce cook for 10 minutes until it thickens slightly.
7. Return the chicken breasts to the slow cooker, coating them in the creamy mustard sauce before serving.

Jake’s Tips for the Best Slow Cooker Creamy French Mustard Chicken

• For Juicier Results: Boneless chicken thighs work just as well and won’t dry out as easily.
• Don’t Skip the Slurry: The cornstarch-water combo is key for getting the sauce to cling beautifully to the chicken.
• Batch Cooking Tip: Double the recipe to freeze portions for future meals—just reheat and serve over rice or veggies.
• Avoid Overcooking: Check the chicken a little early. Overcooked chicken can dry out, even in a slow cooker.
• Make It Lighter: Replace heavy cream with half-and-half for fewer calories.

Easy Slow Cooker Creamy French Mustard Chicken Variations

• Vegetarian Version: Sub out chicken for hearty cauliflower steaks or chickpeas for a plant-based twist.
• Extra Veggies: Add sliced mushrooms, carrots, or green beans to the slow cooker alongside the chicken.
• Spicy Kick: Stir in a teaspoon of crushed red pepper flakes if you like heat.
• Low-Carb: Serve over cauliflower rice or zucchini noodles for a keto-friendly meal.

Slow Cooker Creamy French Mustard Chicken FAQs

Can I use chicken thighs instead of chicken breasts?

Yes! Boneless, skinless chicken thighs will stay moist and tender, making them a fantastic alternative in this recipe.

Can I make this dairy-free?

Absolutely. Swap heavy cream with full-fat coconut milk and replace Parmesan with nutritional yeast for a dairy-free option.

What’s the best way to thicken the sauce?

Using a cornstarch slurry (1 part cornstarch to 2 parts water) is the quickest method, and it works like a charm every time.

How can I make this a one-pot meal?

Add diced potatoes directly to the slow cooker with the chicken. They’ll soak up the sauce and cook until tender.

How long can I store leftovers?

Refrigerate in an airtight container for up to 3 days, or freeze for up to 2 months. Reheat gently, so the sauce stays creamy.

If you’ve made this Slow Cooker Creamy French Mustard Chicken, I’d love to hear how it turned out! Leave a comment below with your favorite kitchen shortcut or any tweaks you tried.