Creamy broccoli cheddar soup thickened by blended broccoli stalks instead of flour, with sharp cheddar melted in slowly. Gluten-free, low-carb, and keto-friendly.
Creamy Broccoli Cheddar Soup Recipe: Gluten Free & Easy
Ingredients
- 4 tbsp Butter
- 32 oz Chicken Stock
- 1 crown Broccoli
- 1 Onion
- 2 cloves Garlic
- 1/2 lb Shark Cheddar Cheese Shredded
- 2 oz Heavy Cream
- Salt, to taste
Instructions
- Prep the broccoli: Remove the florets and chop into bite-sized pieces. Chop the stalk into 2-inch chunks.
- Chop the onion: Dice and set aside.
- Cook the base: Melt butter in a soup pot over medium heat. Add the stalks and onion, season with salt, and cook about 20 minutes until soft. They're ready when they break apart easily with a spoon and smell slightly sweet rather than sharp.
- Add garlic: Mince and cook 30 seconds to 1 minute, until fragrant.
- Add broth and blend: Add the stock, simmer 10 minutes, remove from heat, and blend until smooth.
- Roast the florets: While the soup blends, roast the florets at 350°F for 15–20 minutes, until browned.💡Tip: Keep a close eye on these. They will go from browned to burned quickly.
- Melt the cheese: Keep the heat low or off. Add the shredded cheddar in small handfuls, stirring constantly between additions so each one fully melts before the next goes in. 💡 Why this matters: Adding cheese too fast can make it seize or turn grainy from heat shock.
- Finish and serve: Stir in the heavy cream and the roasted florets. Serve topped with a sprinkle of grated cheddar.
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Equipment
- Large pot or Dutch oven — for sautéing the onions, cooking the broccoli stalks, and building the soup. See my guide to choosing the right Dutch oven if you’re not sure which one to buy.
- Immersion blender — the easiest way to blend the softened broccoli stalks directly in the pot until smooth.
- Baking sheet — for roasting the broccoli florets before adding them to the soup.
- Chef’s knife — for chopping the broccoli, stalks, and onion.
- Cutting board — for prep.
- Rotary grater — for shredding the cheddar. Freshly shredded cheese melts more smoothly than pre-shredded cheese.
- Wooden spoon or silicone spatula — for stirring and scraping the bottom of the pot.
🔁 Variations & Add-Ins
- Protein boost: Add cooked chicken or bacon for a heartier soup
- Vegetarian option: Use vegetable broth instead of chicken stock
- Dairy swap: Substitute sour cream + a splash of water for heavy cream
- Extra thickness: Blend more of the broccoli stalks or add cauliflower
🧠 Why This Recipe Works
This soup builds flavor in layers by softening the broccoli stalks and onions first, creating a naturally sweet and savory base. Blending the vegetables gives the soup its creamy texture without relying on flour or starch.
Sharp cheddar is added gradually to create a smooth, rich finish without graininess, while roasted broccoli florets add texture and depth to every bite.
The result is a simple, comforting soup that tastes indulgent but uses straightforward ingredients and easy techniques.
⚠️ Common Mistakes & Fixes
- Cheese turns grainy or stringy → Heat was too high. Always remove soup from direct boiling before adding cheese.
- Soup is too thick → Add a splash of broth or cream while reheating.
- Soup is too thin → Simmer uncovered for 5–10 minutes to reduce liquid.
- Broccoli tastes bland → Make sure stalks are fully softened before blending; undercooked stalks reduce sweetness.
🥦 Why Use the Broccoli Stalks?
Don’t throw away the broccoli stalks! They’re perfectly edible and work especially well in this soup because they become tender and blend into a smooth, creamy base. Using the stalks also gives you a way to add body to the soup without flour, cornstarch, or other thickeners.
Peel away any particularly tough outer layer, then chop the stalks into small pieces so they cook evenly. They should be very soft before blending. If they’re still firm or fibrous, the finished soup won’t be as smooth.
This is also a great way to get more use out of the entire head of broccoli while reducing kitchen waste.
🧀 How to Keep the Cheese Smooth
The key to a creamy broccoli cheddar soup is low heat when adding the cheese. Once the vegetables have been blended and the soup is hot, reduce the heat or remove the pot from the burner before adding the cheddar.
Add the cheese a little at a time, stirring until each addition is completely melted before adding more. Avoid bringing the soup back to a boil after the cheese has been added. High heat can cause the fats and proteins in the cheese to separate, leaving you with a grainy or oily soup instead of a smooth one.
For the best texture, shred your cheddar from a block rather than using pre-shredded cheese.
🍽️ What to Serve With Broccoli Cheddar Soup
This soup is filling enough to serve on its own, but it also pairs well with a simple protein or a crisp salad. For a low-carb meal, try serving it alongside roasted chicken, grilled steak, or crispy bacon.
If you’re looking for something lighter, a simple green salad with a tangy vinaigrette provides a nice contrast to the rich, creamy soup.
And because the soup itself is already packed with broccoli and cheddar, you don’t need much else to turn it into a satisfying meal.
🧊 Storage & Reheating
Store in an airtight container in the refrigerator for up to 4 days.
To reheat, warm gently over low heat on the stove, stirring frequently. Avoid boiling, as high heat can cause the cheese to separate.
This soup can also be frozen for up to 2 months. Thaw overnight in the refrigerator before reheating.
🥗 Diet Notes
This recipe is naturally gluten-free and low in carbohydrates. It can also fit into keto-style eating depending on ingredient choices and portion sizes. It is rich, filling, and works well as a standalone meal or paired with a simple protein.
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