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📘 How do you make tomato soup from a can?

You are standing at the pantry with a heavy red can in your hand. Someone wants tomato soup. The grocery tomatoes in the bowl look like pale tennis balls. Leave them. Tonight the soup comes from the can. J. Kenji López-Alt, writing 15-Minut

4
lessons
~20 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. The can is the fruitChoose canned whole peeled tomatoes packed in juice, crush them yourself, and scale Kenji's first pot.Kenji starts with two 28-ounce cans because canned fruit is picked ripe and already cooked. Winter grocery tomatoes are a different dinner. Whole peeled in juice beats a thin puree.
  2. Onion first, then the mashSoften onion and garlic without browning, treat olive oil as cook-fat and emulsion, and use bread as the cream.Four minutes, soft not brown. Oil carries lycopene and becomes the cream when blended. Two slices of sandwich bread keep the oil droplets from coming back as puddles.
  3. Blend, then taste the acidBlend hot soup safely, rescue a sharp pot with a pinch of baking soda, and treat cream as a second door.Vent the lid, towel, start low. Stella's soda fizzes when it meets acid. Fielding's oil finding and Parks's cream pot are extras. Kenji's first pot can stop at bread.
  4. Bowl, leftover, next potFinish with fresh herbs, refrigerate soup in shallow containers within two hours, reheat to 165°F or a rolling boil, and troubleshoot the next pot.USDA: two-hour clock, 3 to 4 days in the fridge, 165°F to reheat, soups to a boil. Sharp means soda or carrots. Greasy means a broken emulsion. Thin means water or missing bread.

Questions this course answers

Why does Kenji start tomato soup with canned whole peeled tomatoes instead of January grocery tomatoes?

Kenji uses canned tomatoes because you are cooking them anyway, and canned fruit is more reliably ripe year-round than grocery tomatoes. The can already did the first cooking.

In your own words, why can two slices of sandwich bread make tomato soup taste creamy without any dairy?

Oil and tomato juice do not mix. A blender breaks the oil into tiny droplets. Bread's starch and wheat proteins keep those droplets apart, so the soup stays thick and creamy instead of separating.

Match each move to the job it does in the pot

Bread is the cream. Soda is the acid rescue. Dried oregano works in the hot fat. Fresh basil is a finish, not a simmering herb.

Put Kenji's first pot in the order that keeps the onion sweet and the blender safe

Aromatics first, then the mash and short simmer, then a careful blend, then salt and herbs. Salt at the start hides what the tomatoes actually taste like.

Kenji's blender note is there because hot soup can shoot out the top. What do you do?

Kenji: open the vent and hold a kitchen towel over the lid to prevent blowout. Start low. An adult runs the machine.

Stella Parks adds a pinch of baking soda to a too-sharp pot. What is the fizz?

Bicarbonate plus acid makes carbon dioxide. Stella waits for the bubbles to die, then tastes again. Start small. Too much soda tastes soapy.

Grounded in trusted sources

  • J. Kenji López-Alt, 15-Minute Creamy Tomato Soup (Vegan), Serious Eats, updated 24 September 2025, canned whole peeled tomatoes, onion-garlic-oregano sauté, bread as emulsifier, blender oil stream, vented-lid warning, https://www.seriouseats.com/15-minute-creamy-tomato-soup-vegan-recipe
  • Stella Parks, Thick and Creamy Tomato Soup Recipe, Serious Eats, updated 28 September 2025, browned butter with carrot and onion, three 28-ounce cans, chicken stock, optional 1/4 teaspoon baking soda for sharp acid, one cup heavy cream, https://www.seriouseats.com/thick-creamy-tomato-soup-recipe
  • Jeanette M. Fielding, Kevin G. Rowley, Pauline Cooper, and Kerin O'Dea, Increases in plasma lycopene concentration after consumption of tomatoes cooked with olive oil, Asia Pacific Journal of Clinical Nutrition 14(2):131-136, 2005, 82 percent rise in trans-lycopene with oil versus no significant trans change without oil, PMID 15927929, https://pubmed.ncbi.nlm.nih.gov/15927929/
  • National Center for Home Food Preservation, Ensuring Safe Canned Foods, adapted from USDA Complete Guide to Home Canning, Agriculture Information Bulletin No. 539, NIFA-USDA, revised 2015, tomatoes usually acid but some pH slightly above 4.6, acid foods at or below 4.6, https://nchfp.uga.edu/how/can/general-information/ensuring-safe-canned-foods/
  • U.S. Department of Agriculture, Food Safety and Inspection Service, Leftovers and Food Safety, 31 July 2020, 40 to 140 F danger zone, 2-hour rule, shallow containers for soup, reheat leftovers to 165 F, soups and gravies to a rolling boil, 3 to 4 days fridge, 3 to 4 months freezer, https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/leftovers-and-food-safety

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