Tomato basil soup in white bowl with grilled cheese on side plate.

Instant Pot Tomato Basil Soup

This soup is rich, savory, with a hint of sweetness; not to mention a bit of tang from a surprise ingredient: buttermilk!

Course Soup
Cuisine American
Keyword tomato basil soup, tomato soup
Prep Time 5 minutes
Cook Time 20 minutes
Total Time 25 minutes
Servings 8
Calories 174 kcal
Author The Foodie Eats


  • 4 Tbsp. butter
  • 1 cup yellow onions diced
  • 30 oz. canned tomatoes petite diced
  • 28 oz. canned tomato sauce
  • 2 cups homemade chicken broth
  • 1/3 cup sugar
  • 1/4 tsp. cracked black pepper
  • 1 oz. fresh basil finely chopped
  • 0.5 oz. fresh parsley finely chopped
  • 1 cup buttermilk (or heavy cream)


  1. Using sauté setting – begin melting butter and add onions. Cook onions for about 3 minutes, stirring frequently. You don’t want any color on them, so if they begin to brown, turn off heat.

  2. Add diced tomatoes, tomato sauce, chicken broth, sugar, and black pepper to pot. Lock lid and cook for 1 (yes, one) minute at high pressure. Don’t worry, the soup will cook plenty as it comes up to pressure. Once cook time is complete, quick-release pressure.

  3. Remove lid and add basil, parsley, and buttermilk. Mix well and serve.

Recipe Notes

You'll notice that (for once) there is no salt added to this recipe. There is salt in the butter, tomatoes, tomato sauce, and broth. No need to add anymore. But don't get used to me saying that. Lol.

It's a little unconventional to use buttermilk in this soup, but give it a try! It adds a unique tang that cannot otherwise be duplicated.

If at all possible, I recommend using homemade chicken broth. It will add a richness to this otherwise very light soup.

Nutrition Facts
Instant Pot Tomato Basil Soup
Amount Per Serving
Calories 174 Calories from Fat 63
% Daily Value*
Total Fat 7g 11%
Saturated Fat 4g 20%
Cholesterol 19mg 6%
Sodium 961mg 40%
Potassium 776mg 22%
Total Carbohydrates 25g 8%
Dietary Fiber 4g 16%
Sugars 19g
Protein 4g 8%
Vitamin A 24.6%
Vitamin C 30.7%
Calcium 10.2%
Iron 15.4%
* Percent Daily Values are based on a 2000 calorie diet.