Broccoli Cheddar Soup

Velvety, flour-free broccoli cheddar soup thickened with cream, cheese and a pinch of xanthan gum, with plenty of tender broccoli in every spoonful.

  • Net carbs6.8 g
  • Prep10 min
  • Cook25 min
  • Serves6
✓ Vegetarian✓ Gluten-free✓ Egg-free✓ Nut-free
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Nutrition per serving

1 cup
Net carbs
6.8g
Calories
353kcal
Protein
12g
Fat
31g
Total carbs
8.8 g
Fiber
1.9 g
79% fat 14% protein

Calculated from USDA FoodData Central values for each ingredient (optional ingredients excluded). Brands vary — check your labels if you track closely.

A low-carb swap for: wheat flour (23 g net per ¼ cup) , broccoli cheddar soup (15 g net per 1 cup) . This recipe has 6.8 g per serving.

Ingredients

6 servings
Version

Estimated cost $11.12 for 6 servings ($1.85 each) · how we estimate

Instructions

  1. Melt the butter in a large saucepan or Dutch oven over medium heat. Cook the onion 3–4 minutes, stirring, until soft and translucent, then add the garlic for 30 seconds until fragrant.

  2. Pour in the broth, add the broccoli and bring to a boil. Lower the heat and simmer, partly covered, 10–12 minutes until the broccoli is fork-tender.

  3. For a creamy-but-chunky soup, scoop out about 1 cup of florets, give the rest a few pulses with an immersion blender, then return the florets. Skip the blending if you like it fully chunky.

  4. Stir in the cream and bring back to a gentle simmer. Sprinkle the xanthan gum evenly over the surface while whisking constantly, then simmer 2 minutes until the soup lightly coats a spoon.

  5. Turn the heat to low. Add the cheddar a handful at a time along with the dry mustard, stirring until each handful melts before adding the next. Don't let the soup boil once the cheese is in, or it can turn grainy.

  6. Season with salt, pepper and a pinch of nutmeg, and serve hot.

Tips for success

  • Shred the cheddar from a block. Pre-shredded cheese is coated in anti-caking starch that stops it melting smoothly.
  • Xanthan gum is powerful — ¼ teaspoon is plenty, and more turns the soup slick. Whisking as you sprinkle prevents lumps.
  • Serve with cheddar garlic biscuits for dunking.

Nice to have, not needed

  • An immersion blender thickens the soup right in the pot — mashing some florets against the side works too.

Storage & meal prepMeal-prep friendly

  • Keeps 4 days in the fridge
  • Doesn’t freeze well

Reheat: Reheat gently over low heat with a splash of broth, stirring; don't let it boil.

Refrigerate up to 4 days. Reheat gently over low heat with a splash of broth, stirring, and don't let it boil. Cheese soups can turn grainy when frozen, so freezing isn't recommended.

Variations

2 variations, each with its own ingredients and macros

Chicken broccoli cheddar

Protein

Chicken breasts poached right in the broth, then shredded back in — a filling one-pot dinner.

  • + 1 lb boneless, skinless chicken breasts

6.8 g net · 444 kcal · 29 g protein · 33 g fat · ≈$2.55 per serving (same net carbs as the original)

Vegan

Diet

Coconut milk, nutritional yeast and blended cauliflower make a creamy, cheesy-tasting soup with no dairy at all.

  • butter → olive oil
  • heavy cream → canned coconut milk
  • sharp cheddar → nutritional yeast
  • + 2 cups cauliflower florets

7.2 g net · 178 kcal · 5.9 g protein · 14 g fat · ≈$1.69 per serving (+0.4 g net carbs vs the original)

Broccoli Cheddar Soup — pin image

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