Wednesday, May 20, 2009

Strawberry and Black Raspberry Jam Recipe

In Iowa, wild black raspberries (not the same thing as black berries) are quite abundant. You can even pick them for free along side hiking trails. I figure that with such an abundant supply, there is no excuse for me not to include raspberries in my canning.

Since strawberries and black raspberries are the most plentiful berries at my house, I decided some time ago that I wanted a jam recipe that used both of these. At that time, I didn't find a recipe I liked so I halved the ingredients in a recipe for strawberry jam and also halved ingredients for a recipe for black raspberry jam, and then combined them. This initially created a recipe that called for 3 cups crushed strawberries, and 2 cups crushed black raspberries.

I have since decided that it doesn't really matter what ratio I use. As long as I have a total of 5 cups crushed berries, the jam sets ok. Therefore, I am choosing not to specify the quantity of each berry in today's recipe.

I believe that the recipe would probably turn out equally well with red raspberries.

Strawberry and Black Raspberry Jam (Yields about 8 half-pint jars)

Enough strawberries, and black raspberries to make a total of 5 cups crushed berries
1 package powdered pectin
7 cups sugar

Combine berries and pectin. Bring to boil over high heat. Add sugar, stirring until dissolved. Bring to a rolling boil. Boil for one minute, stirring constantly. Remove from heat. Skim foam, if necessary. Fill hot jars, leaving 1/4 inch headspace. Add lids and process 10 minutes in a water bath.

High altitude instructions
1,001 - 3,000 feet : increase processing time by 5 minutes
3,001 - 6,000 feet : increase processing time by 10 minutes
6,001 - 8,000 feet : increase processing time by 15 minutes
8,001 - 10,000 feet : increase processing time by 20 minutes


  1. Thanks for the recipe! When we get back from our trip the kids and are are going to a farm to pick some berries for jam. I can't wait!

  2. There is a wooded area right across from our house with tons of wild blackberry bushes and I get so happy this time of year to take my little pail and pick them. Now I am thinking they are really close to the black raspberries in your pictures. Well, some are some are not. I wonder if they could be a mix. Some grow straight up and some are way down to the ground.

  3. I found a link that show the difference between blackberries and black raspberries. I don't use blackberries much just because they don't like Iowa winters.

  4. I used the terms interchangeably; goes to show what I know LOL I do enjoy both blackberry and strawberry jams. I'll bet it's delicious combined in a jam--like a bumbleberry pie!

  5. All of my Black Raspberries don't ripen at the same time, so I have a hard time picking enough to make a full batch of jam. do you have a recipe that makes 2 or 3 jars at a time, instead of 8 jars?
    Thanks for your help,

  6. That problem is simple to solve. As you pick the berries, wash them and freeze them. When you have collected enough for a batch of jam, frozen berries work great for making jam.

  7. charlotte is correct, you need to make a full batch or the jam likely won't set. Works good for fruits that ripen at different times; red raspberry + black raspberry or rhubarb + strawberry. Bob K.

  8. Wow Nice Combination of strawberries and black raspberries, also looks very yummy thanks to share nice blog with us

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