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There’s something magical about the way a creamy soup can turn the simplest ingredients into pure comfort. This Low Carb Chicken and Mushroom Soup has become my weeknight hero—rich enough to feel indulgent, yet light enough to keep my macros in check. I first whipped it up on a blustery January evening when the pantry was nearly bare: a lone chicken breast, half a carton of mushrooms, and a splash of cream that I was saving for coffee. Twenty-five minutes later I was cradling a steaming bowl, the scent of thyme and garlic curling through the air, wondering why I’d ever bothered with flour-thickened chowders. One spoonful and I knew this would be on permanent rotation.
Since then, it’s travelled to pot-luck dinners in a slow-cooker, fed a flu-recovering best friend, and even doubled as a keto-friendly gravy over cauliflower mash. The texture is silk-smooth thanks to a quick purée of half the mushrooms, while tender chunks of chicken and meaty mushroom slices give every bite substance. If you’re watching carbs, each generous serving clocks in at just under 6 g net carbs—low enough to fit a strict keto day yet satisfying enough for the whole family. Serve it with a slice of toasted low-carb bread or a simple arugula salad and you have restaurant-quality comfort without the post-meal slump.
Why This Recipe Works
- Double Mushroom Technique: Puréeing half the mushrooms thickens the soup naturally—no flour or xanthan gum required.
- One-Pot Wonder: Everything cooks in a single heavy pot, meaning minimal clean-up and maximum flavour development.
- Fast Weeknight Friendly: From fridge to table in 30 minutes, perfect for busy evenings when you want comfort without delay.
- Meal-Prep Star: Flavours deepen overnight, making this an ideal make-ahead lunch or freezer stash.
- Protein Powerhouse: Each bowl delivers 32 g of protein to keep you full and support muscle maintenance.
- Customisable Creaminess: Swap heavy cream for coconut cream or cream cheese to suit dairy-free or even lower-carb needs.
- Restaurant Taste, Budget Price: Uses everyday staples—no pricey specialty items—to deliver gourmet flavour.
Ingredients You'll Need
Great soup starts with great ingredients. Because this recipe is low-carb, every component pulls double duty—adding both flavour and body without starchy fillers. Here’s what to look for and why each matters.
Chicken Breast (450 g / 1 lb): Choose plump, pale-pink fillets with minimal striation. If the breast is overly moist, pat it dry; excess water will dilute the sauté. Not a breast fan? Boneless, skinless thighs work beautifully and add extra iron. For the ultimate shortcut, use leftover roast chicken or a store-bought rotisserie bird (skip the skin to keep carbs low).
Fresh Mushrooms (400 g / 14 oz): A mix of chestnut (cremini) and white button gives the deepest flavour. Look for caps that are closed around the stem, signalling freshness. Wipe—don’t wash—them; mushrooms act like tiny sponges and waterlogged fungi will steam rather than brown. If you’re feeling fancy, sub in 50 % shiitake for an umami boost.
Heavy Cream (180 ml / ¾ cup): The gold standard for luxurious texture. If you tolerate dairy, go full-fat; the higher butterfat prevents curdling. For a dairy-light version, swap in coconut cream (the thick top from a chilled can) and add a squeeze of lemon to brighten.
Chicken Bone Broth (500 ml / 2 cups): Homemade is king, but a quality low-sodium carton works. Warm broth helps the soup come to temperature quickly and keeps the cream from seizing. Vegetable stock is fine in a pinch, though you’ll lose some depth.
Aromatics: A small onion (or two shallots) plus three fat cloves of garlic build the savoury base. Choose onions that feel heavy for their size with papery skin. Purple onions add sweetness; yellow are more neutral. Smash garlic cloves and let them rest 5 minutes before mincing to activate allicin, the heart-healthy compound.
Butter (30 g / 2 Tbsp): Adds nutty flavour and helps brown the mushrooms. Use unsalted so you control sodium. Ghee is an excellent paleo alternative with a higher smoke point.
Olive Oil (1 Tbsp): Combined with butter, it raises the smoke point and prevents milk solids from burning. A mild avocado oil works too.
Thyme & Bay Leaf: Fresh thyme sprigs infuse earthy perfume; dried is fine—use ½ the amount. One crinkly bay leaf gives subtle tea-like notes. Remember to fish it out before serving.
Salt & White Pepper: White pepper keeps the colour clean, but freshly cracked black pepper is perfectly tasty. Season in layers, not just at the end.
Optional Finishes: A squeeze of lemon lifts the cream; a spoonful of cream cheese whisked in adds tang; chopped parsley adds colour. For heat lovers, a pinch of smoked paprika or cayenne is lovely.
How to Make Low Carb Chicken and Mushroom Soup That Is Creamy
Prep & Season Chicken
Dice chicken into 1 cm (½-inch) cubes. Toss with ½ tsp salt and ¼ tsp white pepper. Let rest while you heat the pan—this short brine seasons the meat throughout and draws out surface moisture for better searing.
Brown the Chicken
Heat a heavy-bottomed pot or Dutch oven over medium-high. Add 1 Tbsp olive oil and 1 Tbsp butter. When the butter foam subsides, spread chicken in a single layer. Sear 2 minutes undisturbed, then flip. You’re looking for golden edges, not full cooking. Remove to a bowl; those browned bits (fond) equal free flavour.
Sauté Mushrooms in Batches
Add half the mushrooms with a pinch of salt. Crowding the pan = grey, steamed fungi. Let them sit 90 seconds, then stir until edges caramelise, about 4 minutes. Transfer to the chicken bowl. Repeat with remaining mushrooms. This two-batch method guarantees meaty, almost steak-like mushroom pieces.
Build the Aromatic Base
Lower heat to medium. Add remaining 1 Tbsp butter and diced onion. Sauté 3 minutes until translucent. Stir in minced garlic and thyme leaves; cook 30 seconds until fragrant but not browned. Deglaze with ¼ cup of your warm broth, scraping the brown flecks into the mix.
Create the Creamy Mushroom Purée
Return half the sautéed mushrooms to the pot. Pour in another ½ cup broth and the bay leaf. Simmer 2 minutes, then fish out bay. Using an immersion blender, blitz until smooth. (No stick blender? Cool slightly, transfer to a countertop blender, then back to the pot.) This purée is your velvety thickener—no roux required.
Simmer & Unite
Add remaining broth, chicken, and mushrooms back to the pot. Bring to a gentle simmer (tiny bubbles at the edges). Reduce heat to low, cover, and cook 8 minutes so flavours meld and chicken finishes poaching.
Enrich with Cream
Turn heat to its lowest setting. Stir in heavy cream plus 2 Tbsp grated Parmesan if using. Taste; add salt and a crack of white pepper. Avoid boiling after cream is added—high heat can cause separation and a grainy mouthfeel. If the soup is too thick, splash in a bit more broth or water.
Finish & Serve
Remove bay leaf. Ladle into warm bowls. Garnish with chopped parsley, an extra swirl of cream, and a crack of black pepper. Serve immediately with keto bread or a crisp cucumber salad.
Expert Tips
Control the Heat
A heavy pot retains heat evenly, preventing hot spots that can scorch cream. If your burner runs hot, use a flame tamer or stack your pot on a cast-iron skillet.
Keep It Smooth
Temper the cream by whisking in a ladle of hot broth before adding it back to the pot. This prevents curdling and keeps the texture silky.
Maximise Umami
Add a splash of dry sherry or white wine after the onions soften. Let it reduce by half before adding broth; the alcohol cooks off but leaves layers of flavour.
Make-Ahead Magic
Cook the soup up to the cream addition, cool, and refrigerate 3 days. Reheat gently, then stir in cream just before serving to preserve freshness.
Freeze Smart
Dairy can separate when frozen; if you plan to freeze, stop after Step 6. Freeze in single-serve silicone muffin trays, then bag. Add cream when reheating.
Colour Pop
For a restaurant-worthy finish, drizzle a teaspoon of herb oil (blend parsley & neutral oil) in a swirl pattern just before serving. It photographs beautifully!
Variations to Try
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Tuscan Style
Swap thyme for oregano and stir in ½ cup sun-dried tomatoes (oil-packed, drained) plus a handful of baby spinach at the very end.
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Spicy Cajun
Season chicken with 1 tsp Cajun spice before searing. Add diced celery and bell pepper with the onion, then finish with a dash of hot sauce.
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Dairy-Free / Paleo
Replace heavy cream with full-fat coconut cream and use ghee instead of butter. Add a squeeze of lime to balance coconut sweetness.
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Extra Veg Boost
Fold in 1 cup riced cauliflower or diced zucchini during the simmer stage. Both keep carbs low while stretching the soup further.
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Decadent Truffle
Drizzle ½ tsp white truffle oil over each bowl just before serving. A little goes a long way and elevates weeknight dinner to special-occasion status.
Storage Tips
Refrigerator: Cool soup completely, transfer to airtight glass jars, and refrigerate up to 4 days. Reheat gently over medium-low, stirring often. If the soup has thickened, loosen with a splash of broth or water.
Freezer: As noted, dairy can split. Freeze soup base (Steps 1-6) for up to 3 months. Thaw overnight in the fridge, then warm and add cream. Portioning into silicone muffin trays gives you easy single-serve pucks that melt quickly.
Meal-Prep Lunches: Pour cooled soup into 500 ml thermos flasks. Pre-heat the flask with boiling water for 5 minutes, then drain and fill. Soup stays hot until noon—no microwave needed.
Frequently Asked Questions
Low Carb Chicken and Mushroom Soup That Is Creamy
Ingredients
Instructions
- Season chicken: Dice and toss with ½ tsp salt and ¼ tsp white pepper.
- Brown: Heat olive oil + 1 Tbsp butter in a heavy pot. Sear chicken 2 min per side; remove.
- Sauté mushrooms: Cook half at a time until golden; set aside with chicken.
- Aromatics: Add remaining butter and onion; cook 3 min. Stir in garlic & thyme 30 sec.
- Purée base: Return half mushrooms to pot with ½ cup broth & bay. Simmer 2 min, then blend smooth.
- Simmer: Add remaining broth, chicken, mushrooms; simmer 8 min.
- Cream finish: Lower heat, stir in cream; warm through—do not boil. Season.
- Serve: Discard bay leaf, ladle into bowls, garnish, and enjoy hot.
Recipe Notes
For deeper flavour, deglaze the pot with ¼ cup dry sherry before adding broth. Store leftovers in airtight containers up to 4 days or freeze cream-free base up to 3 months.
