3 Minute Microwave Jam | The View From Great Island 1

I was noodling around in the kitchen the other day with berries and the microwave.  I was trying to develop a microwave berry crisp when I accidentally discovered this amazing jam.  I guess technically I didn’t discover it, because when I Googled it, there were plenty of others who got there first.  BUT it is new to me, and maybe to you too!  I made a little pot of jam, with no sugar at all, from a cup of mixed berries, in the microwave, in 3 minutes.  And it’s pure fruit heaven.  Because there’s no added sugar, and the jam is flash-cooked, it tastes wonderfully fresh.  And it’s instant gratification, which is always good.

3 Minute Microwave Jam | The View From Great Island 2

And by the way, those other microwave recipes I found?  They all use sugar.    The reason there is so much sugar in traditional jams and jellies is that sugar is a preservative, and functions to help the pectin form a gel.  But for this kind of quick, small batch jam, there’s no need for it.   Your reward is an eye-opening fresh fruit flavor that you will not believe.

3 Minute Microwave Jam | The View From Great Island 3

This works really well with berries because they break down so quickly, and the nice thing is that you can make this with just a handful.  There’s no need for peeling, chopping, or pitting.  I used raspberries and blueberries, but any small berry combination will do.  I didn’t try this with larger blackberries, or strawberries, they would need chopping and probably extra time.

3-Minute No Sugar Microwave Jam

Yield: makes 1/2 cup


  • 1 cup berries (raspberries, blueberries, blackberries, or a mix) rinsed
  • 1/4 tsp corn starch


  1. Put the berries in a large glass bowl. If you are using blackberries and they are large, cut them in half. Toss the berries with the cornstarch.
  2. Cover the bowl with a dinner plate, and microwave for 3 minutes. Give it a stir. If your jam is still very runny, pop it back into the microwave for 30 second intervals. Be careful, it will get quite hot.
  3. Spoon the jam into a clean jar and let cool Store in the refrigerator, the jam will firm up as it cools.

3 Minute Microwave Jam | The View From Great Island 4

You can also use the hot jam, right out of the microwave, as a dessert sauce over cake or ice cream.

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33 Responses to 3-Minute No Sugar Microwave Jam

  1. Janet says:

    This is probably a dumb question, but do you microwave the fruit on High power? Thank you!

  2. Cindy says:

    Super idea but wondering if I can water bath can it and wondered how long to process…thanks

  3. Celeste says:

    Arrowroot is a natural substitute for cornstarch. Use the same amt of arrowroot as cornstarch in any recipe. You can buy it at most health related groceries or online. I make my own yogurt and fruit. I heat the cut up fruit and 1 tsp arrowroot and it is the perfect consistency. Similar to this jam, it lasts in the fridge for over a week. Yummy

  4. Mamato2 says:

    I whipped up some heavy cream into peaks and stirred in some broken up meringues from Trader Joes. I put a layer of the cream mixture in some dessert glasses, then a layer of the jam, then some more of the cream and fresh berries on the top. Made a yummy and easy “Eton mess” dessert :)

  5. Rosa Robichaud says:

    Wondering if a quick, short squeeze of fresh lemon juice might give it that extra little “zing”… to the taste buds, eh?

    Can’t wait to try this!


  6. Naomi says:

    This berry jam will surely be a blast on our breakfast table. Healthy too. Thanks!

  7. […] How to Make 3-Minute No Sugar Microwave Jam […]

  8. georgeann says:

    Loved your no sugar —–3 min jam :)

  9. rosita says:

    Esta mermelada se ve impresionante y exquisita,abrazos

  10. this is news to me and I am jumping up in down right now saying Hallelujah! It is a great gift to us who love jam but never feel like the trouble of it:)

  11. What a great idea! As it doesn’t contain sugar, any idea how long the jam would last in the fridge?

  12. Oh my goodness, I have to try this! I love jam but am a bit terrified to try canning – this is perfect for even me ;).

  13. Who would have thought? What a great idea. I love that there’s no sugar! It looks like it would be great over ice cream or frozen yogurt too.

  14. cheri says:

    This would be wonderful on toast or ice cream. Very clever Sue, it is much nicer than all the others because there is no sugar, it’s perfect.

  15. I can’t believe how quick this is. I spent 45 minutes on my marmalade this weekend :) But I hope it’s worth it. You always do such a wonderful job with jams, jellies and spreads. Lovely! Hope you have a magnificent Monday!

    • Sue says:

      Thanks Tricia — I KNOW your marmalade will be worth it! , But it is nice to know you can have an instant bit of fresh jam now and then, too.

  16. That just looks like a little pot of heaven to me, and I can’t wait to give this a try. I have several months to wait for berry season though. Do you think it would work with frozen berries in the meantime?

  17. Sandra says:

    This was great! I used up some blueberries, blackberries and strawberries that I had and everyone was impressed ! I chopped the blackberries and strawberries and followed the instructions, even my 7 year old granddaughter loved it ! Thanks!

  18. Microwave jam is NEW to me. I think its brilliant. I serve ‘melt’ jam in the microwave to make hot fruit syrups. But I never thought to kind of reverse the action. I love it. Thanx

    • Sue says:

      Oh I’m glad I wasn’t the only one out of the loop! I think you’ll love the fresh fruit flavor of this, Carol.

  19. Bijouxs says:

    Hi Sue. I have been making jams using the microwave, but never without adding sugar – brilliant! Lynn at Bijouxs

    • Sue says:

      Thanks Lynn — I’m sure there are cases where the fruit would be too tart and would need a little sugar. I would love to try this with rhubarb and strawberry!

  20. Wow! What a brillant idea – I have to try this and happen to have raspberries in the fridge….

  21. Really? A 3-minute-jam? wow…I definitely would love to enjoy it hot spread all over my bread!

  22. sippitysup says:

    “Noodling about”. That was one of my mother’s phrases. This easy jam method is “better than a kick in the pants” too. Another one of her phrases. GREG

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