Mary Berry Strawberry Rhubarb Jam Recipe (Canning-Friendly)

This homemade strawberry rhubarb jam is the perfect balance of sweet and tart, with a vibrant flavor that captures the essence of summer. Made without added pectin, this recipe relies on natural ingredients and simple techniques to achieve a beautifully thick, spreadable consistency.

With juicy strawberries, tangy rhubarb, and a subtle hint of vanilla, this jam is ideal for toast, yogurt, desserts, or gifting.

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What Makes This Jam Special

• No pectin needed – Naturally thickens with sugar, lemon juice, and heat
• Balanced flavor – Sweet strawberries + tart rhubarb = perfect harmony
• Rich texture – Smooth, glossy, and easy to spread
• Canning-friendly – Designed for safe water bath preservation
• Enhanced flavor – Macerating the fruit deepens taste and improves texture

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Ingredients

• 2 pounds rhubarb, chopped into small pieces
• 1 pound strawberries, hulled and diced
• 2½ cups granulated sugar
• 3 tablespoons bottled lemon juice
• ¼ teaspoon fine salt
• 1 vanilla bean, seeds scraped

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Equipment You’ll Need

• Large mixing bowl
• Heavy-bottomed pot or Dutch oven
• Water bath canner
• Half-pint jars with lids
• Jar lifter and funnel
• Wooden spoon or spatula

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Step-by-Step Instructions

Step 1: Macerate the Fruit

In a large bowl, combine the rhubarb, strawberries, and sugar. Stir well, cover, and refrigerate for at least 12 hours (or overnight). This helps release natural juices and improves flavor.

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Step 2: Prepare Jars

Wash jars and lids in hot, soapy water. Place jars in a water bath canner and keep them warm while preparing the jam.

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Step 3: Start Cooking

Transfer the macerated fruit mixture to a large pot. Add lemon juice, salt, and vanilla bean seeds. Bring to a boil over medium-high heat, stirring occasionally.

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Step 4: Simmer and Thicken

Once boiling, reduce slightly and continue cooking. Stir frequently as the mixture thickens and the fruit breaks down. This typically takes 20–30 minutes.

To test doneness:

• Spoon a small amount onto a chilled plate
• If it moves slowly and wrinkles slightly when pushed, it’s ready

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Step 5: Fill the Jars

Carefully remove warm jars from the canner. Fill with hot jam, leaving about ¼ inch of space at the top. Wipe rims clean and seal with lids.

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Step 6: Process the Jam

Place jars back into the water bath canner. Bring to a boil and process for 10 minutes. Turn off heat and let jars sit for 5 minutes before removing.

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Step 7: Cool and Store

Allow jars to cool completely at room temperature. Check seals after 24 hours. Store sealed jars in a cool, dark place for up to 1 year.

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Tips for Best Results

• Don’t skip macerating—it improves both flavor and texture
• Use bottled lemon juice for consistent acidity
• Stir regularly to prevent sticking or burning
• Avoid reducing sugar, as it affects setting and preservation

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Serving Ideas

• Spread on toast, scones, or biscuits
• Swirl into yogurt or oatmeal
• Spoon over ice cream or pancakes
• Pair with cheese boards
• Use as a filling for pastries or cakes

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FAQ

How do you thicken strawberry rhubarb jam without pectin?
Strawberry rhubarb jam thickens naturally through the combination of sugar, acid (lemon juice), and heat. As the mixture boils, water evaporates and the natural pectin in the fruit helps the jam set.

Why do you macerate fruit before making jam?
Macerating fruit with sugar helps draw out juices, enhances flavor, and reduces foaming during cooking. This step creates a natural syrup and improves the final texture of the jam.

How do I know when my jam has reached the setting point?
You can test the set by placing a small spoonful on a chilled plate. If it wrinkles slightly when pushed or moves slowly instead of running, the jam is ready.

Can I reduce the sugar in this jam recipe?
No, reducing the sugar will affect the jam’s ability to set properly and may impact preservation and shelf life.

How long does homemade strawberry rhubarb jam last?
Properly sealed jars can be stored in a cool, dark place for up to 1 year. Once opened, store in the refrigerator and use within a few weeks.

Do I need to use bottled lemon juice?
Yes, bottled lemon juice is recommended because it has a consistent acidity level, which is important for safe canning and proper preservation.

Can I freeze strawberry rhubarb jam instead of canning it?
Yes, you can freeze the jam in airtight containers for up to 6 months. Be sure to leave space for expansion.

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Other Recipes You may Like:

• Mary Berry Rhubarb Tart Recipe
• Mary Berry Rhubarb Crumble Recipe
• Mary Berry Rhubarb and Ginger Jam Recipe
• Mary Berry Gluten-Free Rhubarb Crisp Recipe

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