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Low Carb Broccoli Soup

Broccoli soup has become my go-to when I am am not feeling very well or when I want a meatless meal with lots of nutrients. Preparation is easy and uses very few ingredients. It is very low-calorie and can be made low-carb to fit your macros. 
Prep Time10 mins
Cook Time30 mins
Total Time40 mins
Course: Main Course, Soup
Cuisine: American
Servings: 6
Calories: 160kcal
Author: Clean Fingers Laynie


  • 4 tbsp Butter
  • 1 1/2 lbs Broccoli Fresh
  • 1 medium Carrot
  • 1 medium Onion
  • 1 tbsp Xanthan Gum *
  • 4 cups Chicken Broth Low Sodium**
  • 1/2 cup Half-n-Half ***
  • 3 tsp Salt plus more to taste
  • 1 1/2 tsp Pepper plus more to taste
  • 1/2 tsp Red Pepper Flakes optional
  • 1 cup Cheese optional, grated


  • Prepare the vegetables by trimming the woody ends off the broccoli stems (about 1 inch). Chop the rest of the broccoli stems into thin slices (about 1/8th inch) and cut the broccoli florets into bite sized pieces. Dice the onion and slice the carrot into 1/4" pieces. 
  • Melt butter in a medium-sized heavy pot. 
  • Add broccoli, onion, carrot, salt and pepper to pot and saute until onion is translucent, about 6 minutes.
  • Add xanthan gum to pot with vegetables and cook for 1 minute. 
  • Add chicken stock, salt and pepper to pot and bring to a boil. Simmer mixture, uncovered, until broccoli is tender, about 15 minutes. A fork should be able to slide easily in and out of the broccoli. 
    Chicken Broth and Veggies for Low Carb Broccoli Soup
  • Add half and half to pot. 
  • Blend soup in the pot with an immersion blender, or blend in batches in a blender. Be careful as the soup will be hot! I prefer some texture in my soup, but blend to desired consistency. 
    Pureeing Low Carb Broccoli Soup with Immersion Blender
  • Add additional salt, pepper, and red pepper flakes (if using) to taste.


For broccoli cheddar soup, add a cup of cheese to soup after the soup has been blended.
*If not low-carb, can use 3 tbsp of flour.
**I use a 0 carb chicken broth. Be sure to check the carb count of your chicken broth as not all have 0 carbs. I have also substituted chicken bouillon and water. 
***I prefer half and half, but heavy cream or milk can also be substituted. 
To reduce carb count of soup, onion powder can be substituted for fresh onion, and the amount of carrot can be reduced.