As an expert sommelier and brewer, I can provide some insight into the topic of adding vinegar to salsa before canning. It is important to note that the natural acidity of canned salsas may not always be high enough to ensure safe preservation. Therefore, it is commonly recommended to add acid, such as vinegar or lemon juice, to increase the acidity level.
When it comes to choosing between vinegar and lemon juice, both options have their pros and cons. Vinegar is a widely used acid in home canning and is readily available. However, it is important to use vinegar that has at least 5% acid content to ensure proper preservation. It is also worth mentioning that different types of vinegar can have varying levels of acidity, so it is crucial to check the label before using it in canning.
On the other hand, lemon juice is known to be more acidic than vinegar, which makes it a popular choice for increasing acidity in canned salsas. It is important to use commercially bottled lemon juice to ensure consistent acidity levels and avoid any potential variation in acidity that fresh lemons may have. Additionally, using lemon juice has the advantage of not impacting the flavor of the salsa as much as vinegar does.
In my personal experience, I have found that using lemon juice in canned salsas results in a fresher and brighter taste compared to using vinegar. The acidity from lemon juice enhances the flavors of the salsa without overpowering it, allowing the other ingredients to shine through. However, this is a matter of personal preference, and some individuals may still prefer the taste of vinegar in their canned salsas.
To summarize, adding acid to canned salsas is necessary to ensure safe preservation, as the natural acidity may not be sufficient. Vinegar and lemon juice are commonly used acids, with vinegar requiring at least 5% acid content and lemon juice being more acidic while having less impact on flavor. Ultimately, the choice between vinegar and lemon juice depends on personal preference and the desired taste of the salsa.