Preserve end of harvest flavors with homemade salsa
Celebrate late summer's bounty into the new year with bold flavors
With summer harvests winding down, farmers markets and home gardens are overflowing with vine-ripened tomatoes, peppers, onions and other fresh ingredients that are perfect for making salsa to enjoy now or preserve for later.
Making salsa can be a simple and enjoyable end-of-summer project, but if you plan to preserve it for long-term storage, food safety is crucial.
“Salsa is one of the most popular home-canned products, but if you are going to process it for long-term storage, it must be acidified and processed correctly to ensure safety,” said Jenna Anding, Ph.D., Texas A&M AgriLife Extension Service nutrition specialist and professor in the Texas A&M Department of Nutrition.
Overview of canning safety
Proper preservation methods are essential, Anding said. One key to safety is maintaining a pH of 4.6 or lower to prevent the growth of bacteria such as Clostridium botulinum.
Shannon Combest, Ph.D., AgriLife Extension specialist and assistant professor in the Department of Food Science and Technology, said acidified foods are low-acid products, such as tomatoes or peppers, that have been mixed with added acid — like vinegar or lemon juice — to lower the pH to that safe threshold.
As executive director of the Texas Food Processors Association, Combest serves as a process authority for thermally processed shelf-stable acid and acidified foods.
“We review your recipe, pH, ingredients and processing method to determine if the product is safe for long-term storage at room temperature,” Combest said. “This helps prevent dangerous bacteria, like Clostridium botulinum, from growing.”
For this reason, AgriLife Extension recommends following only scientifically tested recipes and approved canning and food preservation techniques, such as water bath canning.
When using a water bath canner, adjust the processing time according to your elevation, following U.S. Department of Agriculture guidelines.
In addition to correct processing, it’s vital to measure ingredients precisely. Vinegar and bottled lemon juice act as acidifiers. Never alter the ratio of vegetables, liquids and acids in the recipe, as this can affect the acidity and safety of the final product, Anding said.
“If you’re thinking about turning your homemade salsa into a product to sell, it’s important to know when to get a process authority involved,” Combest added. “Getting your product evaluated early helps ensure you’re meeting federal regulations and protecting your future customers.”
Tips for canning homemade salsa
With more than 25 years of food preservation experience, Anding shares simple tips to safely turn produce into delicious salsa.
- Choose firm, blemish-free tomatoes, vibrant bell or jalapeño peppers, and onions with tight skins.
- Use only research-based, tested recipes from trusted sources like the USDA or the National Center for Home Food Preservation.
- Avoid using family or improvised recipes for canning unless they have been safety tested.
- Try flexible but approved options for large batches, like USDA’s “Choice Salsa” recipe. This recipe allows up to 9 cups total of onions and peppers. A tested recipe will note the type of canner to use.
- Follow exact ingredient ratios to ensure pH levels meet safety standards.
- Clean and sterilize jars, lids and tools before use.
- Measure and prepare all ingredients before starting.
- Bring water to a rolling boil at 212 degrees in a water bath canner, if at sea level. Then begin to time the processing.
- Adjust processing times based on your elevation. Water boils at lower temperatures at higher altitudes, requiring longer processing to kill bacteria.
How to safely store and use salsa
Food safety procedures continue when it is time to store your salsa:
Label cooled and sealed jars with the date and store them in a cool, dry and dark place; use within one year for best quality and flavor.
- Inspect jars of salsa before opening. Discard them if there are signs of spoilage like broken seals, leaks, mold or off-smells.
Celebrate with a salsa tasting
An alternative to storing salsa is to share the results of your efforts with a salsa tasting party or by gifting jars of salsa to friends, neighbors or family. It’s a simple and heartfelt way to support local agriculture and show off your canning skills.
More salsa-making guidance
If you’re new to canning salsa or would just like some advice, contact your local AgriLife Extension office. They often offer step-by-step guidance and can suggest local hands-on classes or virtual options.
“Salsa is one of the most popular home-canned products, but if you are going to process it for long-term storage, it must be acidified and processed correctly to ensure safety,” Anding said
