I like using apple cider vinegar in canning because I like the flavor, and it comes from apples. Most white vinegar comes from a variety of sources, including wood pulp. I use it white vinegar for cleaning, but it can be substituted in canning recipes if you like. The pH is the same. Lemon or lime juice can also be substituted for the vinegar in this recipe – but they give a more pronounced flavor.
@Carl. My wife is Mexican and I’ve traveled there many times; particularly the state of Michoacán where she’s from. In Mexico, the sauce that you make is called a “Salsa Cruda” (Raw Sauce). It is perfectly fine to make it without frying/simmering since it’s just one of the MANY ways to make a sauce in the Mexican kitchen. I must say that adding cumin to a sauce is more typical of Tex Mex than the authentic Mexican style sauce. Also, lime is only added to something such as pico de gallo. Salsa verde is another sauce that made by cooking tomatillos, jalapeños and a couple garlic cloves in slightly boiling water for about 10 min. Once the tomatillos are cooked, you add them with a little bit of the cooking water, the chilies, garlic, a piece of white onion, cilantro and salt to a food processor. This is carefully processed due to the hot liquid. Tomatillos can be pretty acidic so a pinch of sugar can be added to counter that. I’ve been in a ranch in Michoacán where they cooked a goat over a wood fire. I saw them make the “birria” (typical Mexican sauce for roasted meats) over the same wood fire. It picked up the smoke taste and I’ll tell you, it was the best BBQ goat that I EVER had!
Combine all ingredients in a large saucepan and heat, stirring frequently, until mixture boils. Reduce heat and simmer for 20 minutes, stirring occasionally. Ladle hot salsa into pint jars, leaving 1/2-inch headspace. Adjust lids and process in a boiling-water canner for 15 minutes at 0–1,000 feet elevation, 20 minutes at 1,001–6,000 feet, and 25 minutes above 6,000 feet.
A note on chili varieties: Mexican cuisine uses a wide variety of chilies with different names and characteristics – most of them essential to the final result of the dish they are used in. You should be able to rather easily acquire the chilies described in this (and future) post cheaply online. If you’re having trouble finding these chilies, I suggest you stick to a mix of Ancho (a mild, fruity variety) and Chipotle (a hotter, smoked variety). Both are readily available and this blend will still lend you quite a bit of the complexity.