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Caramelized Onions

Caramelized onions are a delicious addition to a steak or even over mashed potatoes. My goodness, they are tasty. Here is a simple way to make and can caramelized onions. 

Speaking of canning ….. is canning a sustainable practice?  I don’t think it is, actually. Most people who are in to prepping or survival might think it is.  But in reality, its only sustainable if you have somewhere to buy jars, lids and rings.  And if you really want to get specific, its only sustainable if you have a sustainable energy source that you can use to heat the jars, rings and lids.  Since I have jars, lids, rings and electricity, I can.   But I don’t try to fool myself into thinking its anything more than it is; a temporary way to preserve food on our way to self sustainability.

Caramelized Onions

10 pounds onions, peeled and sliced

3 sticks butter (24 tablespoons)


Put one stick butter in the crockpot, add sliced onions, top with rest of butter, Set to LOW and cook f or 10 hours.

Onions are a low-acid food so they must be pressure canned if you aren’t using vinegar in them.

Put hot onions and sauce into half pint jars. Pressure can at 10 pounds pressure for 70 minutes.


  1. Gini

    We made some of these last night and I canned them this morning. I kept some out for supper and they were great. Going to make more. Thanks and God bless

    • Sylvia

      You’re welcome Gini, I’m glad you made them and like them!

  2. Gini

    How long will these keep?

    • Sylvia

      Like most home canned foods they are best if used within one year but I have some that we are using now that are over one year old and they are still delicious.

  3. linda

    Can you waterbath these

    • Sylvia

      I don’t recommend it, Linda. Onions aren’t naturally acidic enough to water bath and the recipe adds no other acid so I don’t believe its safe to water bath them.

  4. linda

    Can you waterbath the onions?

  5. Polona

    Thanks Sylvia. Mine are in a pressure caner right now. I tasted some before I packed them in jars. YUMM! Please post some more easy canning ideas 🙂
    @Kim: I dice onions and freeze them in ziplock bags all the time.

    • Sylvia

      I’m so glad you tried them!

  6. Heather :) :) :)

    Oh, this is AWESOME!!!! I’m so going to try this this week. I’m actually doing some shopping at Trader Joe’s this week…so I’ll add 10 pounds of onions to my list 😉 🙂 🙂 My dad and I really like caramelized onions, especially as a topping on buffalo burgers 🙂 🙂 Nummy!!!! Thanks for the easy recipe. Love and hugs from the ocean s hores of California, Heather 🙂
    Heather 🙂 🙂 🙂 recently posted..HEATHER’S TEXTURE TUESDAY

  7. Kim @ Homesteader's Heart

    Sylvia, could you freeze these okay? We have an over abundance of onions from our garden right now.
    Kim @ Homesteader’s Heart recently posted..Bloggy Vaca

    • Sylvia

      Kim, I don’t know….. I don’t normally freeze onions except in a stray casserole now and then. I would guess…. probably not. But that’s just me guessing!

  8. Peggy

    I did 18 half pint jars the other day after reading how you planned to do it. They are wonderful. The only problem is that my husband thinks of them as a side dish. He wanted to taste of them so I heated a jar. He took one bite and dumped the whole jar on his plate. I reckon that means he likes them a lot. Thanks for sharing

    • Sylvia

      Haha! Peggy, I am tempted to eat them like that as well! I’ so glad you tried them and like them!