Skip to main content

Tomato Soup

Updated: 10/5/23 3:21 pmPublished: 2/10/20
By Catherine Newman

Sugar Free Tomato Soup RecipePretty, creamy, tangy, and rich, tomato soup is a comforting classic for a reason. There are endless ways to make this recipe your own.

This tomato soup recipe takes very kindly to variation. Two favorites of mine are adding a sliced-up head of fennel to the pot when I’m sautéing the other vegetables, or adding something smoky, such as puréed chipotles in adobo or smoked paprika. And would a little grated cheddar hurt any? I happen to know it would not.

You’ll see in the recipe a note about adding a tiny pinch of baking soda if the soup tastes too acidic: essentially, the baking soda reacts with the acid – it will froth up like one of those volcano science projects – thereby escorting some of the acidity out of the soup in the form of…some kind of gas. (I remembered! It’s carbon dioxide!) Anyway, you won’t need it unless your tomatoes are really not sweet, but it’s nice to have an option besides adding sugar, which we are not doing. (Also, I love to see my own handwritten recipe note, which says, “A pinch of b.s.”)

Recipe Details: Tomato Soup

Active time: 20 minutes

Total time: 50 minutes

Makes 6 servings

Total carbohydrates: 12 grams per serving

Ingredients

  • 4 tablespoons butter
  • 1 onion, chopped
  • 1 stalk of celery, chopped, with some leaves from the middle of the bunch, if they’re handy)
  • 1 carrot, chopped
  • 1 teaspoon kosher salt or 1/2 teaspoon table salt
  • 1 (28-ounce) can peeled whole or crushed tomatoes (I use San Marzano whenever I can)
  • 2 cups chicken or vegetable broth
  • 2 cups heavy cream plus a couple spoonfuls for drizzling, if you like)
  • Black pepper
  • Pinch of baking soda (optional)

Instructions

  1. Melt the butter over medium-low heat in a heavy soup pot, then add the onion, celery, carrots, and salt. Sauté, stirring occasionally, until the vegetables have given up their liquid, that liquid has cooked off, and the onions are translucent and starting to turn golden, around 10-15 minutes.
  2. Stir in the tomatoes and broth and bring to a simmer over high heat. Turn the heat to medium-low and cover the pot, then cook, stirring occasionally, for 30 minutes, until you can smoosh a carrot on the side of the pot with your spoon.
  3. Stir in the cream, and then purée the soup in a blender, in batches. You know how to do this safely, right? Fill the blender jar only half full, remove the center of the lid and use a dish towel over the hole (this prevents steam building up and blowing the lid off). You could use a stick blender if you prefer, but the soup won’t get as smooth.
  4. Return the soup to the pot, add a big grinding of black pepper, reheat gently over low heat, and then taste. You are likely going to need to add more salt. If the soup is too acidic, add a pinch of baking soda (see note). You want the soup to taste balanced and delicious.
  5. Serve the soup with a decorative drizzle of cream.

Photo credit: Catherine Newman

What do you think?

About the authors

Catherine loves to write about food and feeding people. In addition to her recipe and parenting blog Ben & Birdy (which has about 15,000 weekly readers), she edits the ChopChop... Read the full bio »