Onion Jam

The Recycled Cook

By Adrian Sleeman

Onion Jam




Having been given half a dozen extremely large white onions that a friend of mine grew on his allotment I originally set out to make some onion jam with them and in the process that also turned into a classic French onion soup. I will start with
the jam and do a separate blog for the soup later.

Is it technically recycling when you set out to make one thing and end up making two? 


Probably not but they are both great ways to use up rather a lot of onions and they both start of the same way.


First of all you need to peel and thinly slice the onions into a large saucepan. If you use a Mandoline , as I have done, make sure to use the guard provided or risk slicing your fingers as well as the onions. I usually start off just slicing the vegetable but see the guard long before I get anywhere near my fingers.

Sweat off the onions with some cubes of unsalted butter and olive oil, I used a garlic infused oil but that is just my preference. Soften for about 15 to twenty minutes turning frequently over a low heat until the onions are soft and golden brown in colour. 

Note: If making Onion soup you would then add a cup of plain flour to the onion to make a roux which would act as a thickening agent.


To make the Onion jam you need to add two cups of red wine, red wine vinegar (you can use a sherry or a Balsamic vinegar), brown sugar to sweeten (I used a home made apple and ginger jelly but you could also use honey). How much vinegar and sugar you add is totally down to taste but be careful when tasting anything containing sugar, as it gets very hot, make sure you allow it to cool on the spoon first. 


Once the jam is reduced and thickened you can either blitz it to a smooth consistency of if preferred leave the onion slices whole. Adjust the balance of vinegar and sugar to taste and bottle in sterilised jam jars. 


Onion Jam
You don't need to buy expensive jam jars, just rinse out and wash old empty glass jars or just pop them in the dish washer, remove the labels and store until needed. Making your own labels is also a great addition. Apart from saving you money it also reduces glass waste going to landfill.

These can be sterilised before use by putting in the oven for ten minutes on a moderate heat, take care when handling as glass retains heat very well.





Disclaimer: The suggestions and tips on these blog pages are meant to be used in conjunction with common sense. Keeping your family healthy is the priority. Do not use food that is unfit for human consumption and always follow sensible food hygiene guidelines.


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