Rhubarb Jam

• Prep Time: 15 minutes
• Cooking Time: 35 minutes
• Total Time: 50 minutes

Yield

• Makes approximately 5 half-pint jars
• About 80 servings (1 tablespoon each)

Ingredients

• 8 cups fresh rhubarb, chopped into ½-inch pieces
• 4 cups granulated sugar
• 2 tablespoons fresh lemon juice
• 1 teaspoon lemon zest (optional)
• ½ teaspoon vanilla extract (optional)
• 1 packet (1.75 ounces) powdered fruit pectin (optional for a firmer set)

Equipment

• Large heavy-bottomed saucepan
• Wooden spoon
• Potato masher (optional)
• Measuring cups and spoons
• Sterilized half-pint jars with lids
• Water bath canner (if canning)
• Jar lifter
• Funnel
• Ladle

Instructions

Step 1: Prepare the Rhubarb

Wash the rhubarb thoroughly under cool running water. Trim away the leaves completely, as rhubarb leaves are not edible. Remove any tough ends and chop the stalks into small, even pieces about ½ inch long.

Step 2: Combine Ingredients

Place the chopped rhubarb into a large saucepan. Add the sugar, lemon juice, and lemon zest if using. Stir everything together until the rhubarb is evenly coated.

Allow the mixture to sit for about 10 minutes. During this time, the sugar will begin drawing moisture from the rhubarb, helping create a natural syrup.

Step 3: Cook the Jam

Set the saucepan over medium heat and stir frequently until the sugar dissolves completely.

Increase to medium-high heat and bring the mixture to a gentle boil.

Once boiling, reduce slightly and continue cooking for 25–35 minutes, stirring often to prevent sticking.

As the rhubarb softens, gently mash any larger pieces using a potato masher if you prefer a smoother consistency.

If using powdered pectin, stir it in according to the package instructions during the final few minutes of cooking.

Step 4: Test for Doneness

The jam is ready when it has thickened noticeably.

To test:

Place a small spoonful onto a chilled plate.

Let it cool for one minute.

Push it gently with your finger.

If the surface wrinkles and the jam doesn’t immediately run back together, it has reached the proper consistency.

If needed, continue cooking for another 3–5 minutes and test again.

Step 5: Add Vanilla (Optional)

Remove the saucepan from the heat.

Stir in the vanilla extract for a subtle depth of flavor.

Skim off any foam from the top using a spoon.

Step 6: Fill the Jars

Carefully ladle the hot jam into sterilized jars using a funnel.

Leave about ¼ inch headspace.

Wipe the jar rims clean with a damp cloth.

Place lids on the jars and screw on the bands until fingertip tight.

Step 7: Process for Canning (Optional)

Place filled jars into a boiling water bath canner.

Ensure the jars are covered by at least 1 inch of water.

Process for 10 minutes (adjust processing time if required for your altitude).

Carefully remove the jars and allow them to cool undisturbed for 12–24 hours.

Check that each lid has sealed before storing.

If you are not canning, let the jars cool and refrigerate immediately.

Tips for the Best Rhubarb Jam

• Choose fresh, firm rhubarb stalks with vibrant color.
• Avoid using rhubarb leaves.
• Stir frequently to prevent scorching.
• Lemon juice enhances flavor while helping preserve color.
• For a smoother jam, blend briefly with an immersion blender before jarring.
• Add strawberries for a delicious strawberry-rhubarb variation.
• Cinnamon or fresh ginger can provide a warm spice note.
• Always use clean, sterilized jars for safe storage.

Flavor Variations

Strawberry Rhubarb Jam

Replace two cups of rhubarb with chopped strawberries for a sweeter preserve.

Orange Rhubarb Jam

Substitute orange zest and orange juice for part of the lemon juice.

Ginger Rhubarb Jam

Add one tablespoon freshly grated ginger during cooking.

Vanilla Rhubarb Jam

Increase vanilla extract to one teaspoon for a richer flavor.

Honey Rhubarb Jam

Replace up to one-third of the sugar with honey for a different sweetness profile.

Serving Suggestions

This homemade rhubarb jam is incredibly versatile.

Serve it with:

• Toast
• English muffins
• Biscuits
• Croissants
• Pancakes
• Waffles
• Scones
• Yogurt
• Oatmeal
• Cheesecake
• Ice cream
• Thumbprint cookies
• Peanut butter sandwiches
• Charcuterie boards

It also works wonderfully as a filling for pastries, cakes, and homemade doughnuts.

Storage

Refrigerator

Store refrigerated jam in airtight jars for up to 3 weeks.

Freezer

Freeze in freezer-safe containers for up to 12 months. Leave headspace for expansion.

Canned

Properly processed and sealed jars can be stored in a cool, dark pantry for up to 12 months. Once opened, refrigerate and use within 3 weeks.

Common Questions

Why is my jam too runny?

The jam may simply need a few more minutes of cooking. It will also continue to thicken as it cools.

Can I reduce the sugar?

Sugar contributes to both texture and preservation. If you want a lower-sugar version, use a pectin specifically designed for reduced-sugar jams and follow its instructions.

Can I use frozen rhubarb?

Yes. Thaw frozen rhubarb first and include any juices released during thawing in the pot.

Do I need pectin?

Not necessarily. Rhubarb can make a softer jam without added pectin. Pectin simply creates a firmer set.

Nutritional Information (Approximate Per Tablespoon)

• Calories: 45
• Carbohydrates: 12 g
• Protein: 0 g
• Fat: 0 g
• Saturated Fat: 0 g
• Fiber: 0.2 g
• Sugar: 11 g
• Sodium: 1 mg
• Potassium: 20 mg
• Vitamin C: 2 mg
• Calcium: 10 mg
• Iron: 0.1 mg