3-Minute Microwave Jam is an amazingly fresh and vibrant jam is made in just minutes in the microwave, without any of the muss and fuss associated with traditional jam making ~ score!
can you really make jam in the microwave?
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 the jam is flash-cooked, it tastes wonderfully fresh. And it’s instant gratification, which is always good.
what you’ll need
- small berries like raspberries, black raspberries, blueberries, gooseberries, or small blackberries
- cornstarch
- sugar or sugar substitute, optional
yes you can add sugar or your favorite sugar substitute
If a no sugar jam is too tart for your taste, add a tablespoon of sugar.
If you want to make a lower carb jam, use your favorite sugar substitute.
how to make small batch jam in the microwave
- Put berries and cornstarch into a large microwave safe bowl and toss together. Sugar can be added, but is optional.
- Cover the bowl with a microwave safe plate that fits securely on top.
- Microwave of full power for 3 minutes.
- Carefully remove the bowl and stir the jam. If it is very watery, give it another 30 seconds to a minute in the microwave.
- Transfer the jam to a jar and let cool before refrigerating. The jam will thicken as it chills.
- Enjoy!
This easy jam recipe needs no 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. Of course you can always add it if you like, but it’s nice to know you don’t have to.
Experiment with different types of berries for this microwave jam
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. This is a perfect use for a handful of wild-picked berries!
do berries have pectin?
With the exception of blackberries and gooseberries, berries tend to be low in pectin, but as long as you cook them down to remove moisture, they can be made into an instant jam like this.
tips and troubleshooting for microwave jam
- Be sure to use a large, microwave safe bowl, and a microwave safe plate that fits securely over the top.
- Use oven mitts and be careful ~ it gets super hot!
- This particular technique was developed for berries only. Other types of fruit like apples and stone fruit won’t work in the same way.
- Small soft berries like raspberries or black raspberries work best.
- Berries differ in their moisture content. If your jam is very watery after 3 minutes, give it another 30 seconds (or up to 2 minutes) longer. Stir again and remember it will thicken as it chills.
- When using large berries like blackberries make sure to cut them in half, and mash them down with the back of a spoon after cooking. My blackberry jam took 2 minutes longer to cook, and I mashed them after 3 minutes.
- Don’t be tempted to do a larger batch. The jam boils up considerably during microwaving and if you use more it can boil over and make a mess.
- Can you do this in a saucepan on the stove? Yes! In that case you can safely double or triple the amount as long as you use a big enough saucepan, and allow extra time.
how long will microwave jam last?
This will last up to a week, refrigerated. For longer storage, freeze your jam.
The microwave is an amazing tool
- Easy Microwave Potato Chips Recipe
- How to Dry Herbs in the Microwave
- Easy Microwave Citrus Curd Recipe
- Microwave Cranberry Curd
- Instant Microwave Macaroni and Cheese
- Easy Microwave Peanut Brittle
caution!
This recipe is not a suitable project for children. The jam, bowl, and plate get very hot in the microwave. Use oven mitts and be careful when removing it from the microwave.
3-Minute Microwave Jam
Equipment
- microwave oven, mine is 1000 watt
Ingredients
- 1 cup small berries, raspberries, blueberries, blackberries, or a mix rinsed
- 1/4 tsp corn starch
- 1 Tbsp confectioner's sugar, or any sweetener of your choice, optional
Instructions
- 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 and sugar if you are using.
- Cover the bowl with a microwave safe 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. Note: Be careful, it will get quite hot so use caution, and oven mitts.
- Spoon the jam into a clean jar and let cool Store in the refrigerator, the jam will firm up as it cools.
- Use or freeze the jam within one week.
Notes
- You can also use the hot jam, right out of the microwave, as a dessert sauce over cake or ice cream.
Nutrition
I doubled the blackberries and the cornstarch and it is way too thick. How can I thin it out?
I would try blending in some warm water or fruit juice Shawna.
Looks wonderful! But, did you find a recipe for a crisp, too? I’ve been looking for one without so much butter!
It’s the perfect method for a crisp.
How long does this jam last in the fridge? Thinking about gifting some to a friend and want to be sure she doesn’t keep it too long!
It’s good for about a week or so, probably longer, Beth, but this is purposely a small batch, so it will probably be eaten up faster than that!
Thank you!
I can’t wait to try this. As a diabetic, a no sugar jam is perfect!
I think you’ll have fun with this, Mary. You can basically make any jam into a no -sugar recipe, just cook the fruit down until thick on the stove or in the micro. You can flavor it with lemon juice, vanilla bean, cardamom, etc.
Thank you for sharing this. I made a little batch with fresh blackberries and frozen blueberries. Knowing store-bought frozen blueberries produce more liquid, I added extra cornstarch and a small sprinkle of sugar to taste. The wonderful aroma, the beautiful color, and fresh berry taste….outstanding!
Thanks so much Diane, I so happy it worked out so well.
Does it have to be a glass bowl?
It just needs to be a microwave safe dish. ?
Yes, that’s right.
This looks delicious. Jam that tastes like it was picked fresh from the garden. Can’t wait to try it.
Oh gosh – I made this and got a very thin sauce. ISW that one quarter teaspoon measure of cornstarch correct? My family needs a jam which stays up, on the toast or scones … please help!
Just microwave it a little longer, Jan, it should thicken up as it cooks. Your berries could have been extra juicy.
Thank you so much for this recipe, very much appreciated now I don’t have to buy store bought jam!! This jam is healthier too.
This is probably a dumb question, but do you microwave the fruit on High power? Thank you!
Yes, Janet, I use high. Good luck!