Homemade Slow Cooker Chicken Casserole with Bacon and Creamy Mustard Sauce Recipe

Introduction

This homemade slow cooker chicken casserole is a comforting, hands-off meal perfect for busy days. Tender chicken thighs combine with crispy bacon, hearty vegetables, and a creamy mustard sauce that simmers all day for effortless deliciousness.

The image shows a white oval slow cooker filled with a creamy chicken stew. The dish has large pieces of light brown cooked chicken scattered through a thick creamy sauce with herbs. Bright orange carrot slices are mixed evenly around the chicken. Small crispy pieces of bacon with a dark reddish-brown color are spread across the top. Fresh chopped green herbs are sprinkled over the whole stew, adding a touch of color. The cooker sits on a white marbled surface, and to the side is a small bunch of fresh green leaves. photo taken with an iphone --ar 4:5 --v 7

Ingredients

  • 2.2 lb chicken thighs
  • 2.5 oz flour
  • 2 onions
  • 3 celery stalks
  • 1.1 lb carrots
  • 7 oz bacon
  • 1.5 cups chicken stock
  • 2 tbsp mustard
  • 2 tsp thyme
  • 1 tsp garlic powder
  • Salt to taste
  • Black pepper to taste
  • 4 tbsp creme fraiche
  • 3 tbsp parsley

Instructions

  1. Step 1: Dice the onions, chop the celery into ½-inch pieces, and cut the carrots into 1-inch chunks. In a small bowl, mix the flour, thyme, garlic powder, salt, and pepper. Cook the bacon in a skillet over medium-high heat until crispy, about 8-10 minutes. Transfer bacon to a paper towel to drain, then crumble once cooled.
  2. Step 2: Pat the chicken thighs dry with paper towels and season with salt and pepper. Dredge each piece in the flour mixture, shaking off any excess. Layer the onions, celery, carrots, and crumbled bacon at the bottom of the slow cooker.
  3. Step 3: Arrange the floured chicken thighs on top of the vegetable and bacon layer. In a bowl, whisk together chicken stock, mustard, thyme, garlic powder, salt, and pepper. Pour this mixture gently around the chicken, avoiding pouring directly on top.
  4. Step 4: Cover the slow cooker and cook on HIGH for 4 hours or LOW for 6 hours until the chicken is tender and easily pulls apart with a fork.
  5. Step 5: Stir in the creme fraiche into the hot casserole until smooth. Fold in the chopped parsley and adjust seasoning with salt and pepper as needed before serving.

Tips & Variations

  • Use boneless chicken thighs for easier serving, or substitute with chicken breasts but reduce cooking time to prevent drying out.
  • Swap bacon with turkey bacon, pancetta, or omit for a lighter dish and add 1 tablespoon olive oil instead.
  • Replace celery with bell peppers or parsnips for a different flavor.
  • Use sour cream or heavy cream in place of creme fraiche; if using Greek yogurt, stir it in off heat at the end to avoid curdling.
  • Try different mustards like Dijon, whole grain, or yellow to vary the tang.
  • Substitute fresh thyme with 1 teaspoon dried thyme or try rosemary or sage for new herb flavors.
  • To deepen flavor, brown the chicken briefly in bacon fat before adding to the slow cooker.

Storage

Store leftovers in an airtight container in the refrigerator for up to 4 days. This casserole tastes even better the next day as the flavors meld. You can freeze portions for up to 3 months; thaw completely before reheating. Reheat gently on the stovetop over medium-low heat, stirring occasionally, or use the microwave at medium power to keep chicken tender. Add a splash of chicken stock if the sauce thickens too much when reheated.

How to Serve

The image shows a white oval ceramic dish filled with a creamy chicken stew. The dish has three main layers: at the bottom is a light creamy sauce with green herbs mixed in, above it are chunks of soft cooked chicken pieces in a pale color, and scattered on top are thick slices of bright orange carrots and small crispy bits of brown bacon. Fresh green chopped parsley is sprinkled evenly over the whole dish, adding a fresh touch. The dish rests on a white marbled textured surface. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use chicken breasts instead of thighs?

Yes, you can substitute chicken breasts, but they tend to dry out in slow cookers. Reduce cooking time and check for doneness earlier to keep the meat juicy.

Do I have to brown the bacon and chicken first?

While optional, browning bacon and coating chicken in the flour mixture enhances flavor and helps thicken the sauce, giving a richer, more satisfying result.

Print
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Homemade Slow Cooker Chicken Casserole with Bacon and Creamy Mustard Sauce Recipe


  • Author: Naomi
  • Total Time: 4 hours 15 minutes to 6 hours 15 minutes
  • Yield: 6 servings 1x

Description

This Homemade Slow Cooker Chicken Casserole features tender, juicy chicken thighs cooked low and slow with crispy bacon, hearty vegetables, and a creamy mustard sauce. It’s a comforting one-pot meal perfect for busy days, requiring minimal hands-on time while delivering rich and satisfying flavors that improve with leftovers.


Ingredients

Scale

Chicken and Coating

  • 2.2 lb chicken thighs (boneless or bone-in)
  • 2.5 oz flour
  • Salt, to taste
  • Black pepper, to taste

Vegetables

  • 2 onions, diced
  • 3 celery stalks, chopped into ½-inch pieces
  • 1.1 lb carrots, cut into 1-inch chunks

Meat and Fat

  • 7 oz bacon

Liquids and Seasonings

  • 1.5 cups chicken stock
  • 2 tbsp mustard (Dijon, whole grain, or yellow mustard)
  • 2 tsp fresh thyme (or 1 tsp dried thyme)
  • 1 tsp garlic powder

Finishing Ingredients

  • 4 tbsp crème fraîche
  • 3 tbsp fresh parsley, chopped

Instructions

  1. Prepare Mise en Place and Cook Bacon: Dice the onions, chop celery, and cut carrots into chunks. Measure flour, thyme, garlic powder, salt, and pepper into a bowl. Cook bacon in a skillet over medium-high heat until crispy, about 8-10 minutes, then drain and crumble once cooled. This preparation ensures all ingredients are ready to assemble efficiently.
  2. Coat Chicken and Build the Base Layer: Pat chicken thighs dry, season with salt and pepper, and dredge in the flour mixture, shaking off excess. Layer the diced onions, celery, carrots, and crumbled bacon at the bottom of the slow cooker to create a flavorful bed for the chicken.
  3. Assemble and Season the Casserole: Place the floured chicken on top of the vegetable and bacon layer. In a small bowl, whisk together chicken stock, mustard, thyme, garlic powder, salt, and pepper. Pour the liquid gently around the chicken to keep it moist without making it soggy.
  4. Cook the Casserole: Cover the slow cooker and cook on HIGH for 4 hours or LOW for 6 hours until the chicken is very tender and easily pulls apart with a fork. Using the LOW setting is preferred for more tender meat and deeper flavor development.
  5. Finish with Crème Fraîche and Fresh Herbs: Stir the crème fraîche into the hot casserole off heat to avoid curdling. Fold in chopped parsley and adjust seasoning with salt and pepper to taste before serving.

Notes

  • Resist opening the slow cooker lid during cooking to prevent adding extra cooking time.
  • Do not overload the slow cooker; fill only up to two-thirds for even cooking.
  • Browning bacon and coating chicken in flour adds flavor and helps thicken the sauce naturally.
  • Sear chicken thighs in bacon fat for extra flavor (optional).
  • Add crème fraîche at the end to prevent curdling.
  • Leftovers reheat well and can be stored in the fridge for up to 4 days or frozen for up to 3 months.
  • When reheating, use medium-low heat and add a splash of chicken stock if needed to loosen the sauce.
  • Chicken breasts can be substituted but reduce cooking time to avoid dryness.
  • Alternative vegetables like bell peppers or parsnips can replace celery.
  • Turkey bacon, pancetta, or diced ham are viable bacon substitutes.
  • Crème fraîche can be swapped with sour cream, heavy cream, or Greek yogurt (add yogurt off heat).
  • Any type of mustard works; Dijon or whole grain adds a nice tang.
  • Fresh thyme can be replaced with dried thyme, rosemary, or sage.
  • Prep Time: 15 minutes
  • Cook Time: 4 to 6 hours
  • Category: Dinner
  • Method: Slow Cooking
  • Cuisine: American

Keywords: slow cooker chicken casserole, chicken thighs casserole, creamy chicken casserole, one pot chicken slow cooker, easy chicken dinner, comfort food, meal prep chicken casserole

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