Keto Broccoli Cheese Soup
Ready in 30 Minutes
Cream Based Low Carb
Nutrition Facts
Keto broccoli cheddar soup is a low-carb version of the classic cream-based soup traditionally thickened with a butter and flour roux. Instead of flour, this version relies on heavy cream, cream cheese, and melted cheddar to create a naturally thick, rich texture, while broccoli remains the star vegetable throughout. Because it skips the flour-based thickener entirely, this version keeps the carbohydrate count low enough to fit comfortably within a standard ketogenic or low-carb eating plan, while still delivering the same comforting, cheesy flavor people expect from the classic version.
Ingredients
Method
Tips
Chicken broth can be swapped for vegetable broth for a vegetarian version.
Heavy cream can be replaced with full-fat coconut cream for a dairy-reduced option, though this will add a subtle coconut flavor.
Sharp cheddar can be swapped for a milder cheddar or a cheddar and gruyere blend for a different flavor profile.
Cream cheese can be replaced with mascarpone for an even richer, slightly sweeter base.
Fresh broccoli can be swapped for frozen broccoli florets, though you may need to reduce the added liquid slightly since frozen broccoli releases extra water as it cooks
Variations
Bacon Broccoli Cheddar Soup: Top each bowl with crispy cooked bacon crumbles for extra flavor and crunch.
Ham and Broccoli Cheddar Soup: Stir in diced cooked ham for a heartier, protein-packed version.
Spicy Broccoli Cheddar Soup: Add a pinch of cayenne pepper or a few dashes of hot sauce for a spicy kick.
Cauliflower Broccoli Cheddar Soup: Replace half the broccoli with cauliflower florets for a slightly different flavor and texture.
Chicken Broccoli Cheddar Soup: Stir in shredded cooked chicken for a more filling, complete meal in a bowl.
Smoky Gouda Broccoli Soup: Swap half the cheddar for smoked gouda for a deeper, smokier flavor.
Extra Garlicky Version: Increase the garlic to 4 cloves for those who love a bolder, more pronounced garlic flavor throughout the soup.
Herb-Infused Broccoli Cheddar Soup: Stir in a teaspoon of fresh thyme or a pinch of dried thyme for an earthy, herbal note.
Storage
Store leftovers in an airtight container in the refrigerator for up to 4 days. When reheating, warm the soup gently over low heat on the stovetop, stirring occasionally, since high heat can cause the dairy to separate. This soup is not recommended for freezing, since cream-based soups tend to separate and become grainy once thawed, affecting both texture and appearance.
Serving Suggestions
SERVING SUGGESTIONS
Serve this soup on its own as a warming main course, or pair it with a simple side salad for a lighter, well-rounded meal. It also works well as a starter before a heartier main dish, or ladled over shredded rotisserie chicken for a more substantial dinner. For extra texture, top each bowl with a sprinkle of extra shredded cheddar, crispy bacon bits, or a few croutons made from low-carb bread.
Questions
Common questions about this recipe
- Is this recipe actually keto-friendly?
- Why doesn't this recipe use flour to thicken the soup?
- Can I use frozen broccoli instead of fresh?
- Why is my cheese clumping instead of melting smoothly?
- Can I blend this soup completely smooth?
- Can I make this soup vegetarian?
- How long does this take to make?
- Can I make this soup ahead of time?
- Can I freeze this soup?
- What's the best cheese to use for this recipe?
- Can I add protein to make this a more complete meal?
- Why is my soup too thin?
- Why is my soup too thick?
- Can I use pre-shredded cheese instead of shredding my own?
- Is this soup spicy?
- Can kids eat this soup?
- What can I serve alongside this soup?
- Can I use half-and-half instead of heavy cream?
- Is this recipe gluten-free?
- Can I make this soup dairy-free?
- How can I make this soup smokier in flavor?
- Can I double this recipe?
Frequently Asked Questions
Is this recipe actually keto-friendly?
Yes, at about 6g net carbs per serving, this soup fits comfortably within a standard ketogenic eating plan.
Why doesn't this recipe use flour to thicken the soup?
Traditional broccoli cheddar soup uses a flour-based roux to thicken the base, but flour adds unnecessary carbs for a low-carb diet. This version relies on heavy cream, cream cheese, and melted cheddar to achieve a naturally thick texture instead.
Can I use frozen broccoli instead of fresh?
Yes, frozen broccoli works well, though you may want to reduce the amount of added broth slightly since frozen broccoli releases extra moisture as it cooks.
Why is my cheese clumping instead of melting smoothly?
This usually happens if the cheese is added too quickly or over heat that is too high. Add the cheese gradually over low heat, stirring continuously, for the smoothest results.
Can I blend this soup completely smooth?
Yes, if you prefer a fully smooth, pureed texture rather than a chunky soup, you can blend the entire pot with an immersion blender or in batches in a regular blender.
Can I make this soup vegetarian?
Yes, simply swap the chicken broth for vegetable broth to make this a fully vegetarian soup.
How long does this take to make?
About 30 minutes total, making it a quick option for a weeknight dinner.
Can I make this soup ahead of time?
Yes, it can be made a day in advance and stored in the fridge, though it is best reheated gently over low heat to avoid separating the dairy.
Can I freeze this soup?
It is not recommended, since cream-based soups tend to separate and become grainy once frozen and thawed.
What's the best cheese to use for this recipe?
Sharp cheddar is recommended for the boldest flavor, though a mix of cheddar and gruyere or smoked gouda also works well for a different flavor profile.
Can I add protein to make this a more complete meal?
Yes, shredded cooked chicken, diced ham, or crispy bacon are all great additions that turn this soup into a heartier, more filling meal.
Why is my soup too thin?
This can happen if too much broth is used relative to the cream and cheese. Simmering the soup a bit longer to reduce slightly, or adding a bit more cream cheese, can help thicken it up.
Why is my soup too thick?
Simply thin it out with a splash of extra chicken broth or cream until it reaches your desired consistency.
Can I use pre-shredded cheese instead of shredding my own?
You can, but freshly shredded cheese melts more smoothly, since pre-shredded bags are often coated in anti-caking agents that can affect texture.
Is this soup spicy?
As written, it is not spicy at all, though you can easily add cayenne pepper or hot sauce for a spicier version.
Can kids eat this soup?
Yes, it is a mild, cheesy, kid-friendly soup that most kids and teens enjoy.
What can I serve alongside this soup?
A simple side salad, low-carb bread for dipping, or a protein like grilled chicken all pair well with this soup.
Can I use half-and-half instead of heavy cream?
You can, though the soup will be noticeably less rich and thick, since heavy cream has a much higher fat content that contributes significantly to the texture.
Is this recipe gluten-free?
Yes, since there is no flour used as a thickener, this recipe is naturally gluten-free as written.
Can I make this soup dairy-free?
This would require significant substitutions, such as coconut cream and a dairy-free cheese alternative, and the flavor and texture would differ noticeably from the traditional version.
How can I make this soup smokier in flavor?
Adding smoked paprika, as suggested in the ingredient list, or swapping part of the cheddar for smoked gouda both add a nice smoky depth.
Can I double this recipe?
Yes, though you will want to use a larger pot to accommodate the increased volume, and it may take a few extra minutes to come to a simmer.