Canning Tomato Soup: Safe, Easy & Shelf-Stable at Home
Canning tomato soup at home is one of the most rewarding preservation projects a home cook can undertake. A pantry stocked with jars of homemade soup — ready to heat and eat at a moment’s notice — is the ultimate food security achievement. A reliable tomato soup canning recipe lets you preserve the peak flavor of summer tomatoes to enjoy all winter long.
Learning how to can tomato soup requires understanding food safety principles, but the process itself is more straightforward than most people expect. Whether you are making tomato soup for canning in a water bath canner or pressure canner, or simply looking for the best home canned tomato soup formula, this guide walks through every step safely and clearly.
Safety First: Choosing the Right Canning Method
Tomato soup is a borderline-acidic food. Plain tomato soup made from tomatoes alone has a pH that may allow water bath canning if proper acid is added. The USDA recommends adding citric acid or bottled lemon juice to all canned tomatoes to ensure safe acidity. Any tomato soup canning recipe that includes low-acid additions like chicken broth, cream, butter, or vegetables with no added acid must be pressure canned. When in doubt, pressure can — this is always the safer choice for home canned tomato soup.
A Tested Tomato Soup Canning Recipe
Ingredients
For a water-bath safe tomato soup for canning: 10 lbs ripe tomatoes (peeled and cored), 2 cups diced onion, 4 garlic cloves, 2 tablespoons olive oil, 2 teaspoons salt, 1 teaspoon sugar, fresh basil, and citric acid (quarter teaspoon per quart jar) or bottled lemon juice (2 tablespoons per quart). Do not add cream, butter, or broth to this version — these additions require pressure canning.
Process
Sauté onion and garlic in olive oil until softened. Add peeled tomatoes and simmer for 30 minutes. Use an immersion blender to blend until smooth. Strain for a silky texture if desired. Season with salt, sugar, and basil. Prepare your water bath canner and sterilized jars. Add citric acid to each jar, ladle hot soup in leaving half-inch headspace, remove air bubbles, wipe rims, and seal. Process quart jars for 35 minutes (pints for 30 minutes) in a boiling water bath. This tomato soup canning recipe follows USDA guidelines.
How to Can Tomato Soup with Added Ingredients
If you want to add chicken broth, onions, or peppers to your canned soup, you must use a pressure canner. How to can tomato soup with these additions: follow the same base recipe but add your extra ingredients and process at 10 lbs pressure for 75 minutes (pints) or 90 minutes (quarts). Never improvise canning times — use tested recipes from trusted sources like the National Center for Home Food Preservation. Home canned tomato soup with added ingredients can be delicious and completely safe when pressure canned correctly.
Tips for the Best Results
Use only fresh, ripe, blemish-free tomatoes for tomato soup for canning — imperfect tomatoes can affect acidity and safety. Roma tomatoes are ideal: they are meaty, low in water, and intensely flavored. Always use bottled lemon juice rather than fresh for consistent acidity. Label your home canned tomato soup jars with the date — use within 18 months for best quality. When serving, reheat and add cream, butter, or fresh basil to the canned base for a restaurant-quality finished soup.
Bottom Line
Canning tomato soup at home is a deeply satisfying project that pays dividends throughout the year. Follow a tested tomato soup canning recipe, understand the difference between water bath and pressure canning, and your home canned tomato soup will be both safe and delicious. Learning how to can tomato soup is a skill that connects you to generations of food preservation tradition.
