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How To Thicken A Keto Tomato Soup

Keto tomato soup is a delicious and healthy recipe that can be used as an appetizer or main course. It is a healthier alternative to the traditional tomato soup recipes. However, the last thing you want from your keto soup- as with any soup- is the base to become a thin and watery broth. 

In this article, we are going to be looking at how to avoid this problem so that you only have the thickest and creamiest keto tomato soup that will taste as good as it looks. 

Let’s take a look at how to go about it!

What Is Keto Soup?

Ketosis refers to a metabolic state where most of the body’s fuel comes from fat rather than carbohydrates. This is achieved by following a low-carb/high fat (LCHF) eating plan. The goal is to enter the metabolic state of ketosis, which refers to a high-fat metabolism without using up glucose stores. 

When entering into a state of ketosis, the liver starts producing ketones, which provide energy for the brain and other organs. It also helps reduce hunger pangs. 

When it comes to keto soup recipes, there are various different ways to make them. You can either use store-bought soups or make your own homemade ones.

Homemade soups are healthier because they don’t contain preservatives and additives. If you’re new to making keto soup recipes, it might seem like a daunting task, but it’s really not that difficult. 

Here are some tips on how to make keto soup:

  • Use fresh ingredients
  • Make sure all the vegetables are chopped finely
  • Don’t add too much salt
  • Add spices
  • Avoid adding oil
  • Keep an eye out for fats 

Why Opt For Keto Tomato Soup?

There are several reasons why you might want to opt for keto tomato soup instead of other types of soups. Keto soup contains only healthy fats, protein, and carbs, as well as tasting great and being very filling. 

What Ingredients Do You Need To Make Keto Tomato Soup? 

How To Thicken A Keto Tomato Soup

You will need to make sure that you have all the appropriate ingredients before you start to make your keto tomato soup. Here are some suggestions, though not all of these are necessary. Mix and match some of these ingredients if you so choose, but remember to keep ingredients healthy and fresh so that it will still qualify as keto soup.


This is an obvious one when it comes to tomato soup of any kind! These are some of the best sources of lycopene, which is a powerful antioxidant that fights cancer cells. Tomatoes also help improve cardiovascular health. They are also packed full of vitamins A and C. 

Fresh Basil Leaves

These are a must in any keto tomato soup recipe. Basil has been shown to fight against bacteria and viruses, and it also boosts immune system function. 


Garlic is another important ingredient in keto tomato soup. It adds a lot of flavor and has many benefits. It aids digestion, reduces cholesterol levels, prevents heart disease, boosts immunity, and strengthens bones. 


Celery is often used in keto soup recipes because of its natural sweetness. It also provides nutrients such as vitamin B6, potassium, magnesium, iron, calcium, and fiber. 


Onions are rich in antioxidants and flavonoids. These compounds fight against free radicals and prevent diseases like cancer and diabetes. They also boost the immune system and lower blood pressure. 

Olive Oil

Olive oil adds richness and texture to the soup. It is also a source of monounsaturated fatty acids, which may help prevent heart disease and stroke. 

How To Make Keto Tomato Soup

How To Thicken A Keto Tomato Soup

Before we get into the thickening process, let’s start by looking at how to make a basic keto tomato soup base with the above ingredients. Start by chopping up your onions and garlic. Then chop up your celery and tomatoes. 

Next, pour olive oil into a pan over medium heat. Add your chopped onion and garlic. Stir occasionally until softened. Next, add your chopped celery and stir for another few minutes. Now, add your chopped tomatoes and cook for about 5 more minutes. 

Finally, add your herbs and seasonings. Cook for 3-5 more minutes. While this is cooking, prepare your broth. Bring water to a boil in a large pot. Once boiling, turn down the heat to low and simmer for 10 minutes. Remove from heat and allow to cool slightly. 

Once cooled, strain through cheesecloth or a fine-mesh strainer. Discard the solids and use the liquid for your keto tomato soup base.

What Ingredients Do You Need To Thicken Keto Tomato Soup?

You will also need a different set of ingredients when it comes to thickening up keto tomato soup. Remember to keep them healthy! These can include:

Egg Yolk

Egg yolks contain lecithin, which helps maintain the consistency of your keto tomato soup while adding a nice creamy taste.

Heavy Cream

Heavy cream contains protein and fat, making it ideal for thickening soups. 

Whipping Cream

Whipping cream is similar to heavy cream, but has a higher concentration of fat. It is perfect for whipping into keto tomato soup.


Butter is good for adding richness and flavor to your keto tomato soup. However, you should be careful not to overdo it. Too much butter can cause your keto tomato soup to become greasy.

Butter Substitutes

There are other options available if you do not want to use real butter. Some common alternatives include coconut milk creamer and unsalted almond butter.

Sour Cream

Sour cream is made from fermented milk. This means that it has a tangy taste. It is great for adding thickness and creaminess to your keto tomato sauce.

How To Thicken A Ketogenic Tomato Soup

So, how exactly do you thicken up keto tomato soup? Let’s take a look at how to do so with some of the ingredients that we have mentioned above.

First, you’ll need to separate out your egg yolks from your whole eggs. Place your egg yolks in a bowl and beat well. Next, place your heavy cream and whisk vigorously. If you don’t have a hand mixer, simply put your heavy cream in a stand mixer fitted with the whisk attachment. 

Now, slowly add your egg yolks to your heavy cream mixture. Continue beating at a high speed until all the yolks have been incorporated. Finally, add your butter and continue mixing until combined. Your keto tomato soup should now be thickened. 

If you would like to further thicken up your keto tomato soup, you can always add additional ingredients such as sour cream, heavy cream, whipped cream, or even butter.

Final Thoughts

Making keto tomato soup can be very simple, and thickening it is just as easy. There are various ways to do so, including the way that we have mentioned above. Mix and match ingredients – both for the main body of the soup and the thickening agents – to find the mixture that works best for you. 

As long as you keep the ingredients healthy, you’ll be making the thickest, healthiest, and most delicious keto tomato soup in no time!

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