Quick Blackberry Jam

July 29, 2021
3 Ratings
Photo by Julia Gartland
  • Prep time 1 hour 5 minutes
  • Cook time 30 minutes
  • Makes about 3/4 cup
Author Notes

Name a better breakfast than crunchy sourdough toast slick with salted butter and sweet-tart blackberry jam—I sure can’t. And while sourdough is a multi-day project, homemade jam comes together in about an hour.

This can be as simple as blackberries, sugar, lemon juice, and a fat pinch of salt. Numerous ingredients pair well with blackberries, from orange flower water and Grand Marnier to ground cardamom and freshly grated ginger. Even the simple addition of citrus zest will turn ordinary blackberry jam into extraordinary blackberry jam. One note: While there are many flavors that go well with blackberry, don’t use all the suggested add-ins in one batch. Stick with one or two, like cardamom and Grand Marnier; ginger and sage; lemon zest and thyme; vanilla extract and grapefruit zest.

Many jam recipes call for pectin, a stabilizer that, when mixed into jam and jelly, encourages gelling and sets the mixture. This jam doesn’t need it, as blackberries are fairly high in natural pectin. Adding lemon juice at the end not only balances all the sweetness—its acid also encourages the fruit’s pectin to set.

A note on storage: Since this is a quick jam, also known as refrigerator jam (think: quick pickles you make an hour before dinner versus canned pickles you make once a year), it’s not processed with a classic canning method, and therefore lasts for less time. Eat within three weeks. Store the jam in a tightly sealed mason jar in the fridge with a bit of space between the jam and the lid to ensure proper sealage. Of course, this recipe can easily be scaled up and canned the traditional way. In that case, the jam is safe to store in the pantry until you’ve broken the jar seal—refer to this guide if you’re interested in exploring that. —Rebecca Firkser

What You'll Need
Watch This Recipe
Quick Blackberry Jam
  • Blackberry Jam
  • 1 pound (2 pints) fresh or frozen and defrosted blackberries
  • 3/4 cup granulated sugar
  • 2 tablespoons fresh lemon juice, plus more to taste
  • 1/4 teaspoon kosher salt
  • Optional Add-Ins (pick one to two, see Author Notes)
  • 1/4 teaspoon ground cardamom, plus more
  • 1/2 teaspoon orange flower water
  • 1 teaspoon vanilla extract
  • 1 tablespoon finely grated ginger
  • 1 tablespoon finely grated lemon, orange, or grapefruit zest
  • 1 teaspoon Grand Marnier
  • 3 sage leaves
  • 3 thyme sprigs
  1. In a medium saucepan, combine the fruit and sugar. Let macerate for at least 30 minutes or up to 3 hours at room temperature.
  2. Once the fruit has macerated, heat the saucepan over medium-high heat and bring the mixture to a boil—just keep a watch so it doesn’t boil over. Encourage the berries to break down by gently smashing them with a wooden spoon.
  3. Continue to cook, scraping the bottom frequently and using the spoon to smash and further break down the berries, for 15 to 20 minutes, until the mixture reduces and thickens to a texture that can only be described as jammy. Reduce the heat to medium-low to low, stir in the lemon juice and salt, and continue to cook, stirring often, for 10 minutes. Taste and add more lemon juice if you want things a bit more tart.
  4. If you’d like, now is also the time for your add-in(s). Stir until combined. Remove from the heat and let the jam cool. If using fresh herbs, remove them after 30 minutes and discard. Transfer the jam to a clean mason jar with a lid that seals—make sure there’s a bit of space between the top of the jam and the jar lid. Store in the refrigerator and use within 3 weeks.

See what other Food52ers are saying.

  • Leah
  • Rebecca Firkser
    Rebecca Firkser
  • Nan
  • judy

7 Reviews

Leah August 1, 2020
I'd like to try canning this recipe! How long should the jam process for in a traditional canning water bath?
Rebecca F. August 2, 2020
Hi! I haven't tried canning this recipe in a water bath, so I can't really recommend a specific processing time. Looks like most recipes for canned jam call for about 10 minutes at a rolling boil, but again, I've never tried it so please don't take my word for it!
Leah August 2, 2020
Giving it a try today! Thanks for the response :)
Nan August 4, 2020
Leah can you please let us know how the canning went as I would love to can add well !
Thank you
Leah August 4, 2020
Hi Nan, the canning went well! I made a very large batch with 5lbs of blackberries. I filled half pint jars and processed for 10 minutes in a water bath. The jam was delicious but might reduce the sugar a bit next time. Happy canning!
Nan August 4, 2020
Thank you
I also like to cut back on the sugar.
judy August 3, 2021
I do a lot of home canning. This is a recipe for a very small batch. 3/4 cup. I noted that Leah upped the volume. That will make it much easier. You may want to check out micro-wave canning for the small batch that this is in this recipe. I also cut back on sugar about 25%. Still came out beautifully. My add-ins? lemon juice, because it brightens the flavor of the jam. Happy canning.