Creamy Crockpot Chicken and Mushroom Soup

When the slow cooker lid comes off, the chicken is tender and the mushrooms have softened, but the broth still looks thin. That’s expected here. I finish this creamy crockpot chicken and mushroom soup with a quick butter-and-flour mixture whisked with hot broth and cream; it gives the soup body without asking the slow cooker to do all the thickening.

Boneless, skinless chicken thighs are a good fit for the long, gentle cook because they stay tender while the mushrooms, onion, celery, garlic, and thyme season the broth. Once the chicken is cooked, I shred it and return it to the pot before stirring in the cream mixture. The finished soup is cozy and savory, with tender chicken in a lightly thickened, creamy broth.

Why This Soup Needs Its Thickener at the End

A slow cooker is excellent at tenderizing chicken and melding the savory parts of a soup, but it doesn’t give a flour-thickened base the same control as a saucepan. If flour goes straight into the cooker, it’s harder to whisk smooth and can leave little pasty pockets. Here, I make a small roux separately, then loosen it with hot broth from the pot before adding the cream.

That order does two useful things. The butter and flour cook together first, so the flour gets a minute on the heat rather than tasting raw. Then the hot broth helps the roux blend into a smooth mixture before it meets the soup. The cream joins that mixture, not the slow cooker by itself, so you can whisk it evenly before stirring it through the chicken and vegetables. The goal isn’t a heavy, spoon-standing chowder; it’s a broth that lightly clings to the shredded chicken and mushrooms.

There’s no need to thicken the soup early or judge it before the final cooking window. The mixture goes back into the slow cooker for a short finish, where it heats through and thickens slightly. That final texture is part of what makes this a soup rather than a casserole-style filling.

What the Chicken, Mushrooms, and Roux Bring to the Pot

• Chicken thighs — Boneless, skinless thighs bring a tender, full texture after several hours in the slow cooker. Keep the pieces whole for the initial cook, then shred them once they’re cooked; that keeps the chicken from breaking down into tiny strands while the soup simmers.
• Cremini mushrooms — Their earthy flavor gives the broth a savory backbone. Choose mushrooms that look firm and dry rather than slimy or bruised. Wipe away visible dirt or rinse them briefly and dry them well before slicing; wet mushrooms can add extra water to the pot.
• Yellow onion, celery, and garlic — Together, these make the soup’s aromatic base without needing to sauté them first. Dice the onion and celery so they cook evenly, and mince the garlic so it disperses through the broth instead of leaving large, sharp pieces.
• Low-sodium chicken broth — Low-sodium broth gives you better control over the final salt level, since the soup also includes kosher salt. A regular-sodium broth will make the finished soup saltier; I’d keep the listed salt out if making that swap, then taste the soup before adding any.
• Butter, flour, and heavy cream — These are what turn the broth into a creamy soup rather than simply adding creaminess at the very end. Heavy cream gives the smoothest, richest finish. Milk is thinner and doesn’t deliver the same body, so it isn’t a like-for-like swap here.
• Dried thyme and bay leaf — Dried thyme can season the broth throughout the long cook, while the bay leaf adds a quiet herbal note. The bay leaf is there to infuse the soup, not to eat, so remove it before returning the shredded chicken.

Building the Soup in the Slow Cooker, Then Finishing It on the Stove

Load the cooker and let the chicken turn tender

Add the chicken, sliced cremini mushrooms, diced onion and celery, minced garlic, broth, dried thyme, kosher salt, black pepper, and bay leaf to a 6-quart slow cooker. Stir to combine, cover, and cook on LOW for 5 to 6 hours or HIGH for 3 to 4 hours. Check the thickest part of a thigh with a thermometer; it should reach 165°F before you move on. Keep the lid on during the cook so the slow cooker can hold its heat.

Shred the chicken while the broth stays in the pot

Lift the cooked chicken out onto a plate, then remove and discard the bay leaf. Use two forks to pull the thighs into shreds; the meat should separate easily rather than resist the forks. Return the shredded chicken to the slow cooker and stir it through the broth and vegetables. If a piece still feels tough to pull apart, it needs more time in the cooker before shredding.

Whisk a smooth cream mixture in a saucepan

Melt the butter in a 2-quart saucepan over medium heat, whisk in the flour, and cook the mixture for 1 minute. Gradually whisk in 2 cups of hot broth ladled from the slow cooker, adding it steadily while whisking so the mixture stays smooth. Whisk in the heavy cream until combined. If you rush the broth in all at once, small lumps are more likely; steady additions give you time to smooth them out.

Give the soup its short, creamy finish

Stir the cream mixture into the slow cooker, cover, and cook on HIGH for 20 to 30 minutes. The soup should be hot throughout and slightly thickened, not stiff or paste-like. Stir it before serving so the chicken and mushrooms are distributed in the creamy broth. If you’re checking early and it still looks loose, give it the full finishing window rather than adding more flour directly to the cooker.

Simple Ways to Change the Soup Without Losing Its Comforting Character

Questions That Come Up While Making This Crockpot Soup

Creamy Crockpot Chicken and Mushroom Soup

Creamy crockpot chicken and mushroom soup cooks chicken thighs, cremini mushrooms, and vegetables in a slow cooker, then gets thickened with a smooth butter, flour, and cream mixture. The shredded chicken and sliced mushrooms make every bowl hearty and comforting.

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Prep Time 15 minutes mins

Cook Time 6 hours hrs 31 minutes mins

Total Time 6 hours hrs 46 minutes mins

Servings: 6 servings

Course: Dinner

Cuisine: American

Calories: 650

Ingredients Equipment Method Notes

Ingredients

  

• 2 lb chicken thighs boneless, skinless
• 1 lb cremini mushrooms sliced
• 1 yellow onion medium, diced
• 2 celery ribs, diced
• 3 cloves garlic minced
• 6 cup low-sodium chicken broth
• 1 tsp dried thyme
• 1 tsp kosher salt
• 0.5 tsp black pepper
• 1 bay leaf
• 4 tbsp unsalted butter
• 0.33 cup all-purpose flour
• 1.5 cup heavy cream

Equipment

• 1 6-quart slow cooker
• 1 2-quart saucepan

Method

 

1. Put the chicken, mushrooms, onion, celery, garlic, broth, thyme, salt, pepper, and bay leaf in a 6-quart slow cooker and stir to combine.
2. Cover and cook on LOW for 5 to 6 hours or HIGH for 3 to 4 hours, until the chicken reaches 165°F at its thickest part.
3. Transfer the chicken to a plate.
4. Remove and discard the bay leaf.
5. Shred the chicken with two forks.
6. Return the chicken to the slow cooker.
7. Melt the butter in a 2-quart saucepan over medium heat.
8. Whisk in the flour and cook for 1 minute.
9. Gradually whisk in 2 cups of hot broth ladled from the slow cooker.
10. Whisk in the heavy cream until smooth.
11. Stir the cream mixture into the slow cooker.
12. Cover and cook on HIGH for 20 to 30 minutes, until the soup is hot and slightly thickened.

Notes

For tender chicken, check that it reaches 165°F at its thickest part before shredding. Refrigerate leftovers for 3 to 4 days; freezing is not recommended because the cream may separate. For a gluten-free option, use a 1:1 gluten-free flour blend in place of the all-purpose flour.

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