I grew up stealing spoonfuls of my grandmother’s rhubarb jam straight from the pot, and this cinnamon-scented version has been my quick go-to ever since. It’s bright, tangy, and warm with spice—a small-batch preserve that turns spring rhubarb into something you’ll want on everything. If you like spreading fruit jam on toast or folding it into pastries, this recipe is fast, forgiving, and excellent for gifts or lazy weekend breakfasts. For a cozy baking companion, serve a slice of bread with this jam or pair it with a spice loaf like an apple cinnamon swirl loaf to echo the cinnamon notes.
Why you’ll love this dish
This jam is a tiny miracle of texture and flavor from just a handful of ingredients. Rhubarb gives a natural tang that needs less sugar than many fruits, while the cinnamon adds warming depth that makes the preserve feel cozy without being heavy. It’s:
- Fast to make: most of the work is waiting while the rhubarb releases juices.
- Budget friendly: rhubarb is inexpensive in season and the pantry staples are classic.
- Versatile: great on breakfast bread, stirred into yogurt, or used as a filling for baked goods.
- Gift-worthy: jars look charming and store well enough for gifting during the season.
Make it in spring when rhubarb is at its brightest, or any time you want a tart-sweet spread with a hint of spice.
The cooking process explained
Overview: Chop rhubarb and toss with sugar and cinnamon, then let the mixture macerate so the fruit yields juice. Add lemon juice and bring to a rolling boil, sprinkle in pectin, and boil hard for 1–2 minutes to activate the pectin. Remove from heat, skim foam if you like, and transfer into sterilized jars. Cool, then refrigerate or water-bath process for shelf storage.
This step-by-step flow sets expectations so you won’t be surprised by sticky counters or missed timing: macerate, boil, pectin, jar.
What you’ll need
- 4 cups chopped rhubarb (about 1 to 1.25 pounds), trimmed and cut into 1/2-inch pieces
- 2 cups granulated sugar
- 1 teaspoon ground cinnamon
- 1/4 cup lemon juice (fresh is best)
- 1 package fruit pectin (follow the pectin package for low- or no-sugar varieties if adjusting sugar)
Ingredient notes: If you prefer a less sweet jam, use low-sugar pectin and reduce sugar according to the pectin manufacturer’s chart. Brown sugar will give a deeper flavor but may darken the color. If you only have frozen rhubarb, thaw and drain briefly before measuring.
Directions to follow
- Place the chopped rhubarb, sugar, and ground cinnamon in a large, heavy-bottomed saucepan. Stir to combine. Let the mixture sit for 30 minutes so the rhubarb releases juices and sugar begins to dissolve.
- Stir in the lemon juice. Set the pan over medium heat and cook, stirring frequently, until the mixture reaches a full, rolling boil that cannot be stirred down.
- Sprinkle the fruit pectin evenly over the boiling mixture. Stir quickly and thoroughly to dissolve the pectin. Return to a strong boil and maintain it for 1 to 2 minutes while stirring constantly so the pectin activates.
- Remove the pan from the heat. Skim off any foam with a spoon if you prefer a clearer jar surface. Ladle the hot jam into sterilized jars, leaving 1/4 inch headspace. Wipe rims, apply lids, and seal. Let jars cool at room temperature. Once cooled, refrigerate if you did not process them, or follow a water-bath canning schedule if you want shelf-stable jars. Jam will thicken as it cools.
Best ways to enjoy it
This jam is bright enough for morning and rich enough for dessert. Try these pairings:
- Spread on warm toast, English muffins, or buttery scones.
- Swirl a spoonful into plain yogurt or oatmeal for a tart-sweet lift.
- Layer between cake or use as a filling for thumbprint cookies and hand pies.
- Serve on a cheese board with mild cheeses like Brie or ricotta and crackers.
For a delightful brunch pairing, serve alongside an apple loaf or use it to top a slice of an apple cinnamon swirl loaf.
Storage and reheating tips
Refrigeration: If you simply seal jars and refrigerate, the jam will keep for up to 3 weeks. Always use a clean spoon to avoid contamination.
Freezing: Spoon jam into freezer-safe containers leaving a little headspace and freeze up to 12 months. Thaw in the refrigerator.
Canning for shelf stability: If you want pantry-stable jars, process sealed jars in a boiling water bath for 10 minutes (adjust for altitude following USDA or local extension guidelines). Ensure jars, lids, and bands are clean and that you leave the recommended headspace.
Reheating: Warm jam gently over low heat to loosen for spreading; do not overboil once pectin has set. If jam seems too firm after refrigeration, let it sit at room temperature for 15–30 minutes or warm briefly.
Helpful cooking tips
- Use a heavy-bottomed pot to prevent the jam from scorching as it comes to a boil.
- Measure pectin and sugar carefully; both affect the set. If using a different pectin type, follow its package instructions exactly.
- Taste early to adjust cinnamon level, but add more sparingly than you might expect; ground cinnamon concentrates when cooked.
- Prevent foam by boiling gently before adding pectin and skimming foam off the top once the jam is done. A few bubbles are normal.
- If you prefer a smoother texture, pulse the cooked jam briefly with an immersion blender, but do this only after it has cooled slightly and before jarring.
Creative twists
- Strawberry-rhubarb: Add 1 to 1 1/2 cups chopped strawberries for a classic pairing.
- Ginger-cinnamon: Add 1/2 teaspoon ground ginger or 1 tablespoon grated fresh ginger for warmth.
- Orange zest: Stir in 1 teaspoon orange zest with the lemon juice for citrus brightness.
- Low-sugar version: Use a low- or no-sugar pectin and sweeten to taste with honey or a sugar substitute approved for jams, following pectin package directions.
- Spiced jam: Add a whole star anise during simmering and remove before jarring for a subtle anise note.
Common questions
How do I know when the jam has set?
There are two quick tests: the spoon test and the cold-plate test. For the spoon test, drag a wooden spoon across the bubbling jam; if it parts and the surface wrinkles slightly, it’s close. For the cold-plate test, chill a small plate in the freezer, spoon a little jam onto it, let it sit 30 seconds, and push it with your finger—if it wrinkles, it’s set.
Can I use frozen rhubarb?
Yes. Thaw frozen rhubarb and drain excess water before measuring. The texture may be softer, so the jam can cook faster; watch for the rapid boil after adding pectin.
Can I make this jam shelf-stable without a water-bath canner?
Not safely. To store jars at room temperature, you must process them in a boiling water bath using proper canning procedures. Simply sealing jars and leaving them at room temperature risks spoilage.
What if my jam is too runny after cooling?
If it’s still runny, reheat the batch to a boil and add another small amount of pectin following package instructions for extra thickening. Alternatively, simmer longer to reduce water but watch closely to avoid burning.
How long will unopened, properly processed jars last?
Properly processed and sealed jars can keep for up to 12 months in a cool, dark pantry. Once opened, refrigerate and use within 3 weeks.
Cinnamon-Scented Rhubarb Jam
Ingredients
Method
- Place the chopped rhubarb, sugar, and ground cinnamon in a large, heavy-bottomed saucepan. Stir to combine.
- Let the mixture sit for 30 minutes so the rhubarb releases juices and sugar begins to dissolve.
- Stir in the lemon juice.
- Set the pan over medium heat and cook, stirring frequently, until the mixture reaches a full, rolling boil that cannot be stirred down.
- Sprinkle the fruit pectin evenly over the boiling mixture. Stir quickly and thoroughly to dissolve the pectin.
- Return to a strong boil and maintain it for 1 to 2 minutes while stirring constantly so the pectin activates.
- Remove the pan from the heat. Skim off any foam with a spoon if you prefer a clearer jar surface.
- Ladle the hot jam into sterilized jars, leaving 1/4 inch headspace. Wipe rims, apply lids, and seal.
- Let jars cool at room temperature. Refrigerate if not processing.
