Cranberry Strawberry Jam

[Photograph: Stephanie Stiavetti]

This jam is ultra flavorful, and it will cause your sun-starved salivary glands to kick into high gear. Sweet strawberries are always the life of the party, and we've invited tart cranberries as well, making for a bright red flavor explosion. You'll find the texture of these preserves relatively chunky, but if you prefer your jam smoother, feel free to whiz your just-defrosted fruit a few more times in the food processor for a finer finished product.

I enjoy this incredibly colorful jam most when it's spread on a bagel during a particularly cold winter morning.

Note: Don't skip out on the tiny amount of butter—it goes a long way to prevent foaming.

About the author: Stephanie Stiavetti is a writer and cookbook author in San Francisco. Stephanie's cookbook, Melt: the Art of Macaroni and Cheese, celebrates America's favorite dish by recreating it with small production, specialty cheeses. Her food blog, The Culinary Life, is a repository for all things comfort food related, from savory dinners to transcendental desserts.

Every recipe we publish is tested, tasted, and Serious Eats-approved by our staff. Never miss a recipe again by following @SeriousRecipes on Twitter!

Cranberry Strawberry Jam

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About This Recipe

Yield:Makes Six (8-ounce) jars of jam
Active time:1/2 hour
Total time:1 1/2 hours
Special equipment:Six (8-ounce) mason jars with lids, water bath
This recipe appears in: Preserved: Canning with Frozen Fruit: Cranberry Strawberry Jam

Ingredients

  • 1 pound frozen cranberries, defrosted
  • 3 pounds frozen strawberries, defrosted
  • 1 pound (about 2 1/4 cups) plus 1/4 cup white sugar, divided
  • 1/4 cup brown sugar
  • 1/2 teaspoon kosher salt
  • 3 tablespoons juice from about 2 lemons
  • 1/2 teaspoon butter

Procedures

  1. 1

    Place a small plate in the freezer so you can test the jam for proper thickness later. Sterilize jars and lids. In a food processor, pulse the cranberries until they are coarsely chopped, about three 1-second pulses. Add the strawberries and pulse two more times. If you prefer a smoother jam, feel free to pulse to a finer texture.

  2. 2

    Pour the fruit into a deep, heavy-bottomed pot and toss with 1/4 cup of white sugar. Cover and allow to sit for 1 hour.

  3. 3

    Mash the fruit slightly with a potato masher to break up any clumps that have formed. Add remaining sugar, brown sugar, salt, lemon juice, and butter. Cook over medium heat, stirring occasionally, until the fruit begins to bubble and spit. Use a skimmer to skim off any foam that forms. Cook for about 20 minutes, stirring frequently to keep the fruit from sticking to the bottom of the pot.

  4. 4

    Begin testing the jam for doneness. Spread 1/2 teaspoon of cooked fruit on the cold plate and place it back in the freezer. Wait 30 seconds, then run your finger through the fruit. It should be thick enough to maintain a path when you run your finger through it. If you’d like thicker jam, place the plate back in the freezer and cook the fruit for another 4 minutes and test again. Repeat until desired thickness is achieved, but be careful about cooking too long or you will alter the taste of your jam.

  5. 5

    Remove pot from heat and use a spoon to skim any foam from the surface of the fruit. Ladle jam into sterilized jars, leaving 1/2-inch of headroom, and process them in a hot water bath for 10 minutes. Unopened jars will keep at room temperature for up to 6 months. Opened jam should be refrigerated.

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