Sauce – How to jar a sauce for keeping at room temperature without adding loads of vinegar or sugar

food-preservationsauce

I'd like to make and sell jars of my mum's satay sauce at our local food markets.

I'm trying to figure out the jarring process so it can be stored at room temperature and not make anyone sick or worse.

My experience in jarring/canning is minimal but I've done some research and would love to get some of your thoughts on my process.

I'm aware of botulism, so the ingredients of concern are fresh chillies, garlic, onions and belacan (salted shrimp paste).

These are fried with peanut oil.

There is sugar and vinegar in the mix.

There is a good amount of sugar however it's definitely not 50% like jam or anything.

The amount of vinegar is not a huge amount (should I ph test this? how and what ph would I look for?)

The rest is peanuts and dried spices.

These are the steps I'm taking at the moment:

  • Sterilize jars and lids in preheated oven @ 140c for 20 mins.
  • Fry fresh ingredients at high temp.
  • Slow cook remaining in large pot at low temp.
  • Fill jars while sauce is hot.
  • Put filled jars in preheated oven @ 140 for 30 mins with lid loosely on.
  • Remove and tighten lid.

When cooled, the lids pops down and is sealed.

The jars are from a local supplier and have confirmed with them that they can be cooked.
(I've tested this process about 3 times with higher heat and the jars withstand it).

How safe is my process?

What have I done wrong, or what can I change/improve?

Should I add some kind of preservative?

I'm open to all suggestions. My goal is to have it kept safe at room temp for at least a month (more is better 🙂 )

Currently, when I hand out test samples I ask people to keep it in the fridge and eat within a week.

Sorry about the long question but I just want to share her amazing sauce and not make people ill.

Best Answer

Your sauce is not safe to can without some sort of preservative (and I know nothing about preservatives). When canning, anything that is "unknown" with regards to safety is generally considered to be unsafe as the risk factor is way too large.

To even begin to tell you if it might be safe you can, we would need a more-or-less exact recipe (dried spices are irrelevant however).

You cannot safely pH test a recipe at home as mixtures are not consistent, pH varies between batches, pH varies between individual jars of the same batch, pH can vary over time somewhat as the jars sit and pH equalizes within the jar itself.

The only safe way to can peanuts that I have found is via this method: http://nchfp.uga.edu/how/can_nuts/green_pnuts.html

This uses a pressure CANNER (not a cooker, you cannot safely can in a pressure COOKER). This is exclusively for green peanuts and I do not know how they compare to whatever kind of peanuts you are using.

The chilies, garlic and onions if fresh are low acid ingredients and thus are not safe to can unless in a pressure CANNER, or in a waterbath without being properly acidified however I suspect that properly acidifying them (essentially pickling them) would drastically change the nature of your sauce. Also, due to the peanuts and shrimp paste you would not be able to safely waterbath your recipe anyways.

I think I can summarize thusly:

  • This is not safe to can in a waterbath method no mater what you do.
  • As user110084 stated in their answer, you cannot can this using an oven safely.
  • The peanuts in your sauce are a large unknown with regards to canning safety and there are no methods that I am aware of to can normal, non-green peanuts safely.
  • The shrimp paste in your recipe would mean that you probably need to account for "shellfish" being in your recipe and can accordingly however the processing time for fish is something like 110 min (for pint jars or smaller) and that would probably over-process the rest of the sauce with regards to quality.
  • The sugar content may scorch if you pressure can this sauce thus causing a quality/taste issue. It may not, but BBQ sauce used on meat sometimes can scorch in a pressure canner when canning BBQ meat so I'm extrapolating somewhat.

*I'd love to be wrong, but until I see some scientific proof then I'll just say: Please don't can the sauce. Sell it frozen or something like that.

If you want to discuss more about why it is unsafe to can, or to get a second option, there is a very SAFE and active facebook group called "Canning" full of helpful people who only advise SAFE canning methods.

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