Refrigerator or Freezer Blackberry Jam

Blackberry Jam
Sam Jones/Quinn Brein


4 cups fresh blackberries (remove stems, wash)
1 cup white sugar (granulated)
Optional: 1 tbsp lemon juice


  1. In sauce pan, mix together mashed berries, sugar and lemon juice. 
  2. Bring entire berry mix to a boil over medium heat, stirring occasionally, until jam is thickened and reaches gel stage, about 20 minutes. 
  3. Prepare your canning jars by heating them in a pot of simmering water (180°F).  Keep them hot until ready to use or wash and dry Ball® plastic jam and jelly jars (8 oz).
  4. Ladle the hot jam into the hot canning jars leaving ¼ inch headspace. 
  5. Clean the rims and put caps on after jam has cooled, and you can handle the jars. Allow the jam to cool completely before moving the jam to the fridge or freezer
  6. Store in the refrigerator for 1-2 weeks or freeze for up to 6 months


Makes 2 6-ounce jars.

Preparation Time

30 Minutes

Total Time

90 Minutes

Reader Comments

Leave a Comment

Love Variety of Readers

I enjoy the comments from seasoned canners as well as questions from people who are new to learning how to enjoy their fruits and berries year round. Your advice is patient and helpful for everyone. I remember long ago when I didn't know what a food mill was.

Freeze for 3 or 6 months?

The notes say the jam can be frozen for up to 3 months at the top and then for up to 6 months at the end.
Which is correct? I want to try making this.


I think there's an error here; 4 cups of fruit and 1 cup of sugar cannot possibly make 4 pints of jam. A pint is 2 cups hence 4 would be 8 cups of jam. I believe that you mean it makes 4 CUPS of jam. But wouldn't it be great if the fruit doubled in volume? LOL!

easy blackberry jam

The Editors's picture

Hi, Denise. Thanks for your feedback. You’re right about the yield being off. This recipe will make about two 6-ounce jars of jam.


My boysenberry seems to be very tart. Is there a way to get them to be sweeter?

I would like to know if you

I would like to know if you have a recipe for strawberry rhubarb jam?

Hi. I had a pretty easy

Hi. I had a pretty easy Freezer Jam recipe,that made just enough for me.I live alone. But seem to have lost it. Can you help please?

I need as much help as I can

I need as much help as I can here. I want to learn how to make blackberry jam. I have never canned anything in my life. In this article it says "Pour into hot sterilized canning jars (leaving headspace), seal, and process for 20 minutes." What does "process" mean here?

In a boiling-water bath, jars

The Editors's picture

In a boiling-water bath, jars of food (in this case, jam) are completely covered with boiling water and heated for a specific amount of time. This method is used to safely can tomatoes, fruit, jams, jellies, and pickles with high acid content.

what is the benefit of

what is the benefit of pressure cooking? I'm new at canning and bought a really nice pressure cooker, but a lot of the recipes i'm seeing don't call for pressure cookers? thanks!

There are two techniques

The Editors's picture

There are two techniques typically used for home canning: boiling-water bath canning and pressure canning. For pickles, onions, and carrots, use the pressure canning method. 

What about blueberries? How

What about blueberries? How would I use them?

Can I freeze the jam?

Can I freeze the jam?

Yes! Your homemade jam can be

The Editors's picture

Yes! Your homemade jam can be frozen for up to 1 year.

My berries and sugar is

My berries and sugar is liquidity. Is it normal?

blackberry jam

1. can i use less sugar ? about 4 cups?
2. Does it not need pectin or lemon juice?

The sugar is needed for the

The Editors's picture

The sugar is needed for the jam to gel, however, you can use less sugar. For every cup of fruit you use, you can add ¾ cup of sugar. You don’t have to use pectin. It is a natural gelling agent found in ripe fruit. Some fruit has more pectin than others. Blackberries have high pectin levels.

Making Preserves

Can you use this same recipe to make preserves instead of jam? I would assume you just wouldn't mash the berries.

Yes, Ginny. Not mashing the

The Editors's picture

Yes, Ginny. Not mashing the berries shouldn’t be a problem.

Blackberry Jam

I do not have a food mill - is there another way I could get the seeds out?

no food mill

The Editors's picture

Hi, Libby- If you don’t have a food mill, you can use a strainer and wooden spoon. Just push the berries through with the spoon as best as you can.

I have 4 day old

I have 4 day old blackberries, are they still good to use for jam?

That's a hard question to

The Editors's picture

That's a hard question to answer. The fresher, the better. Blackberries usually last up to a week, so they should be OK. Some folks believe in using a quarter of slightly underripe berries when they make jam but that's a personal preference. See how it goes! Jam is easy to make.

Can you use raspberries for

Can you use raspberries for this recipe? Instead of blackberries


The Editors's picture


What is a food mill?

What is a food mill?