Table of Contents
Table of Contents
Damson jam is the undisputed queen of plum jams. With its deep, jewel-like purple colour and intense sweet-tart flavour, it captures the very essence of late summer in a jar. While commercial plum jams can be cloyingly sweet, homemade damson jam recipe allows the unique, slightly astringent character of the fruit to shine through.
I have fond memories of foraging for wild damsons in the hedgerows, returning home with purple-stained fingers to watch my grandmother work her magic at the stove. This recipe is faithful to that tradition, relying on the fruit’s naturally high pectin content to achieve a perfect set without the need for artificial additives. It is simple, honest, and utterly delicious.
Note: True damsons (Prunus insititia) are smaller and more oval than round plums, with a distinct spicy, tart flavour that makes them superior for preserving.
What Is Damson Jam?
Damson jam is a traditional preserve made from damsons, sugar, and water. Unlike sweeter dessert plums, damsons are high in both acid and pectin, making them exceptional for jam-making. They set easily and have a depth of flavour that pairs as well with savoury cheeses as it does with morning toast.
The main challenge with damsons is that they are “clingstone” fruit, meaning the flesh clings stubbornly to the stone. Many recipes glaze over this, but dealing with the stones is the most important part of the process. My method gives you options to handle this efficiently, so you don’t spend hours wrestling with sticky fruit.
Ingredients for Authentic Damson Jam
You don’t need a long shopping list for this classic preserve. The quality of the fruit is what matters most.
- Damsons: Look for firm, dark purple fruit with a waxy blue “bloom.” Avoid any that are split or mouldy.
- Sugar: Standard granulated white sugar is perfect. You do not need jam sugar (which has added pectin) because damsons are already rich in natural pectin. Using jam sugar can result in a rubbery texture.
- Water: A small amount is needed to soften the skins before the sugar is added.
- Butter (Optional): A small knob of butter added at the end of the boiling process helps to disperse the foam (scum) for a crystal-clear finish.
Tip: For a festive twist, you can add a cinnamon stick or a star anise during the boiling stage, removing it before potting up.
Ingredients Table
| Ingredient | Quantity | Notes |
|---|---|---|
| Damsons | 1 kg | Washed and stalks removed |
| Granulated Sugar | 1 kg | 1:1 ratio is standard |
| Water | 150 ml | To prevent burning |
| Butter | 1 tsp | Optional (disperses scum) |
Equipment You Need
- Preserving Pan: A wide, heavy-bottomed pan allows for rapid evaporation, which is key to a good set.
- Saucers: Place a couple in the freezer before you start to test for a set later.
- Slotted Spoon: Essential for skimming off stones if you use the traditional method.
- Jam Jars: Sterilized jars with vinegar-proof lids or wax discs and cellophane.
- Jam Funnel: Makes filling jars much cleaner and safer.
The “Stone Problem”: 3 Ways to Pit Damsons
This is the most common question I get asked. Here are the three best ways to tackle damson stones:
- The Freeze & Thaw Trick (Easiest): Wash your damsons and freeze them overnight. When they thaw, the cell walls break down, and you can simply pop the stones out by hand or efficiently use a cherry pitter.
- The “Fish Out” Method (Traditional): Cook the fruit whole. As the flesh softens and breaks down, the stones will separate and float to the surface. You then scoop them out with a slotted spoon. It’s messy but effective.
- The Sieve Method: Cook the fruit until pulpy, then push the whole lot through a coarse sieve or colander. This removes the skins as well as the stones, resulting in a smooth “Damson Cheese” rather than a chunky jam.
How to Make Damson Jam (Step-by-Step)
Follow these steps for a perfect set every time.
Step 1: Prep and Sterilize
First, wash your jars in hot soapy water and rinse well. Place them in a low oven (140°C/275°F) for 15-20 minutes to sterilize. Keep them warm until you are ready to fill them. Wash your damsons and remove any stalks or leaves.
Step 2: Soften the Fruit
Place the damsons and water in your preserving pan. Bring to a gentle simmer. Cook slowly for about 15-20 minutes. You want the skins to be completely soft and the fruit to have broken down into a pulp. Do not rush this stage; if you add sugar before the skins are soft, they will remain tough and chewy in the finished jam.
Step 3: Remove Stones (If needed)
If you haven’t pre-pitted your fruit (using the freezer method), this is the time to remove the stones. They should be floating free from the pulp. Skim them off with your slotted spoon.
Tip: Don’t throw the stones away immediately! Boil them in a separate small pan with a splash of water to extract the last of the pectin and flavour, then strain this liquid back into your main jam pan.
Step 4: Add Sugar and Dissolve
Pour in the sugar. Keep the heat low and stir constantly. You must ensure that every single grain of sugar has dissolved before you let the mixture boil. If you boil too early, you will end up with gritty, crystallized jam. You can tell it’s ready when you don’t feel any crunch against the bottom of the pan and the liquid looks clear, not cloudy.
Step 5: The Rolling Boil
Once the sugar is dissolved, crank up the heat. You want a “rolling boil”—a boil so vigorous that you can’t stir it down. Boil rapidly for 10-15 minutes. Stir occasionally to prevent sticking.
Step 6: Test for Set
Take the pan off the heat. Retrieve one of your cold saucers from the freezer. Place a teaspoon of jam on it and wait a minute. Push the jam with your finger. If it wrinkles and holds its shape, it’s ready (setting point is 105°C/220°F). If it’s still runny, boil for another 2 minutes and test again.
Step 7: Pot Up
Skim off any pink foam from the surface (or stir in that knob of butter to disperse it). Let the jam settle for 10 minutes so the fruit distributes evenly. Ladle into your warm, sterilized jars, leaving a little headspace. Seal immediately.
The Ultimate Damson Jam Recipe: Easy, No-Pectin Method
Ingredients
Method
- 1. Wash the damsons thoroughly and discard any that are bruised or over-ripe. Remove any stalks.
- 2. Place the damsons and water into a large preserving pan over a low heat. Simmer gently for 15-20 minutes until the fruit is completely soft and the skins have burst.
- 3. As the fruit cooks down, the stones will detach. Skim them off the surface with a slotted spoon. (Alternatively, use the ‘freeze & thaw’ method in the notes to pit them before cooking).
- 4. Add the granulated sugar to the pan. Stir over low heat without boiling until every grain of sugar has dissolved. This is crucial to prevent gritty jam.
- 5. Turn up the heat and bring the jam to a rapid, rolling boil. Boil for 10-15 minutes.
- 6. Remove from heat. Place a teaspoon of jam on a chilled saucer. Push it with your finger—if it wrinkles, it is ready. If not, boil for another 2 minutes and test again. Alternatively, check for 105°C (220°F) on a candy thermometer.
- 7. Skim off any pink scum on the surface (stirring in a knob of butter helps disperse this).
- 8. Ladle the hot jam into warm, sterilized jars. Seal immediately with wax discs and lids. Label once cooled.
Notes
Troubleshooting Your Damson Jam
Even with the best recipes, things can sometimes go awry. Here is how to fix common issues.
Why is my jam runny?
This usually means it hasn’t reached the setting point. Damsons are high in pectin, so they want to set. You likely just need to boil it for a few minutes longer. Test frequently. Also, acid helps pectin work, so if you are struggling, a squeeze of lemon juice can sometimes help kickstart the reaction.
Why is my jam too hard?
Overboiling is the culprit here. Once you pass the setting point, the sugars begin to caramelize too much, and the pectin over-sets. Unfortunately, you can’t really reverse this, but it will still taste delicious—perfect for glazing meats or using in tarts.
Why did my jars mould?
This happens if the equipment wasn’t properly sterilized or if the seal wasn’t airtight. Always put hot jam into hot jars to prevent cracking and ensure a sterile environment. Store in a cool, dark place.
Recipe Variations
- Spiced Damson Jam: Add a pinch of ground cloves and a cinnamon stick for a warming, autumnal version. This is lovely spooned over Yogurt Scones.
- Damson & Apple Jam: If you are short on damsons, bulk out the recipe with cooking apples. They are also high in pectin and carry the flavour well.
- Low Sugar: You can reduce the sugar to 750g per 1kg of fruit for a sharper taste, but be aware that the jam won’t keep as long once opened. For more on safety, the National Center for Home Food Preservation has excellent guidelines.
Serving and Storage
Properly potted damson jam will keep in a cool, dark cupboard for up to 12 months. Once opened, keep it in the fridge and use it within 6 weeks.
This jam is versatile. Beyond the classic toast and Traditional Welsh Cakes, it is fantastic stirred into Greek yogurt or used as a filling for Scottish Shortbread. For a savoury twist, try serving a dollop alongside roast game; the tartness cuts through rich fats beautifully.
You can also use it in desserts like Old School Jam Roly Poly or a classic Jam and Coconut Sponge. If you have leftover blackcurrants, try this Easy Blackcurrant Cake which is similar in tartness.
Frequently Asked Questions
Do I need to remove the stones from damsons before making jam?
Not necessarily. You can cook the fruit whole and fish the stones out as they rise to the top (a method often cited by BBC Good Food). However, freezing the fruit first allows you to pop the stones out easily before cooking, which many find less messy.
Can I use jam sugar for damson jam?
It is not recommended. Jam sugar contains added pectin, which is necessary for low-pectin fruits like Strawberry Jam. Damsons are naturally high in pectin, so using jam sugar can result in a set that is too stiff or rubbery. Blueberry Jam is another example where pectin needs to be managed carefully.
How long does homemade damson jam last?
If stored in sterilized, sealed jars in a cool dark place, it will last for at least a year. Once opened, store it in the refrigerator.
What is the ratio of sugar to fruit for damson jam?
The traditional ratio is 1:1 (equal weights of fruit and sugar). This ensures a good set and preservation. If you prefer a tart jam, you can reduce the sugar slightly, but don’t go below 800g sugar per 1kg fruit or it may not set or keep well. See Tin and Thyme for more on whole fruit cooking methods, or Fab Food 4 All for other pitting hacks.
Meet Evelyn
I’ve been making damson jam since I was tall enough to reach the kitchen counter. There’s something deeply satisfying about turning a basket of wild-harvested fruit into rows of gleaming purple jars. It’s a small act of preservation—capturing the fleeting abundance of prolonged summer days to brighten up the dark winter mornings. I hope this recipe brings a little of that seasonal magic into your kitchen.
