Canning 101: How To Save Runny Jam (2024)

Did your homemade jam come out with a softer set than you’d like? Follow the steps in this post to save runny jam!

Canning 101: How To Save Runny Jam (1)

A while back, I wrote a piece all about how to ensure that your jam sets. However, even when you keep all those tips in mind, there’s still a chance that you’ll wind up with a poor set. Here’s what you can do to salvage that jam.

Before Reopening Those Jars

If you don’t want to invest any additional work in that jam, the best choice to make is to change your expectations. If the finished product is just sort of runny, call it preserves (they can be great stirred into oatmeal or yogurt, or spooned over waffles). If it’s totally sloshy, label it syrup and stir it into sparkling water.

Canning 101: How To Save Runny Jam (2)

How to Save Runny Jam

However, if you’re committed to getting a nice, firm, jammy set, there is still hope. Just follow these steps.

First, you wait. Give the jam 24-48 hours to set up (because truly, sometimes it can take that long for pectin to reach the finished set).

If it still hasn’t set, it’s time to determine how much jam needs to be recooked. You don’t want to remake more than 8 cups (4 pints) at a time.

For every 4 cups of jam that needs to be remade, whisk together 1/4 cup sugar and 1 tablespoon powdered pectin.

Pour the jam into a low, wide pan and add the sugar and pectin combo. Stir until the sugar and pectin has dissolved. At this point, prepare your canning pot. Clean the jars and prep new lids.

Place the pot on the stove over high heat and bring the jam to a boil.

Cook vigorously for 5 to 10 minutes, stirring regularly. Look for signs of thickening.

Test set using plate or sheeting test (both described here).

When jam has reached the desired thickness, remove pot from heat.

Pour jam into prepared jars. Wipe rims, apply brand new lids and screw on the same old bands.

Process in a boiling water bath canner for the amount of time requested in the recipe.

When processing time is up, remove jars from bath. Let jars cool and then test seals.

That’s it!

Note: I have closed comments on this post because I am not able to offer jam set solutions on an individual basis. The instructions above should resolve most underset jams. For more on the topic of underset jams, read this post.

Canning 101: How To Save Runny Jam (2024)

FAQs

Canning 101: How To Save Runny Jam? ›

For every 4 cups of jam that needs to be remade, whisk together 1/4 cup sugar and 1 tablespoon powdered pectin. Pour the jam into a low, wide pan and add the sugar and pectin combo. Stir until the sugar and pectin has dissolved. At this point, prepare your canning pot.

How do I fix a jam that is too runny? ›

If, after waiting, you find the jam is still too loose for your liking, empty the jars back into a wide pot and cook again. Wash and sterilize the jars and try again. While you can simply reduce the jam to your liking, you can also add commercial pectin or chia seeds to the reducing jam to guarantee thickening.

How runny should jam be before canning? ›

1) The Saucer Test

Once you think that your jam has reached its setting point or has thickened, spoon a bit of the jam on the cold plate and tilt it vertically so the jam runs. You are aiming for a slow descent, not a runny mess. If it runs slow, it's set!

What can I do if my jelly doesn't set? ›

How do you fix pepper jelly that didn't set? You can try pouring it into a pan and boiling it longer. You can try adding more sugar and boiling it longer. You can try adding some pectin to it and boiling it longer.

What happens if you don't put enough sugar in jam? ›

If you don't have the right amount of sugar, you run the risk of the jam or jelly being runny.

Will homemade jam thicken as it cools? ›

Yes, jam will be quite runny when it's hot, and then will thicken and set as it cools. Sometimes it can take 24-48 hours for the pectin to fully set.

How do you thicken jam without cornstarch or pectin? ›

The secret ingredient to making jam without pectin is time. The fruit and sugar need plenty of time to cook and thicken. A long, slow boil drives the moisture out of the fruit, helping to preserve and thicken it at the same time. Fruit varies in water content as well, and some fruits may take longer to jam up.

How to make jam more spreadable? ›

No longer gate-keeping this food styling secret: microwave your jam for 30-45 seconds to make it glossy and more spreadable 💕👍🏻🍓

What stops jelly from setting? ›

Gelatine is derived from the protein collagen. The enzyme in fresh* pineapple, bromelin, breaks down collagen and this prevents the jelly from setting. If the shape of the active site is distorted, the enzyme can no longer function and is described as being denatured.

Do you let jam cool before putting lids on? ›

As soon as the preserves are spooned or poured into the sterilised jars or bottles, they must be correctly sealed to prevent deterioration. Fill the hot dry jars right to the top – preserves shrink slightly on cooling and a full jar means less trapped condensation. Seal the jars while still hot.

How can I thicken jam without sugar? ›

5 Ways to Thicken Jam
  1. Add chia seeds to the recipe. Chia seed jam is a method of making jam that requires no cooking. ...
  2. Use cornstarch. Cornstarch is a common thickening agent for jams, sauces, soups, and glazes. ...
  3. Try commercial pectin. ...
  4. Use gelatin sheets or powder. ...
  5. Reduce it on the stovetop.
Jun 13, 2022

Does lemon juice help jam set? ›

To set, jam needs the right balance of acid and pectin. High-acid fruits include citrus, cherries, green apples, pineapple, raspberries and plums. If you're using low-acid fruits, such as rhubarb, apricots, peaches and strawberries, you need to add lemon juice.

What is the minimum sugar to preserve jam? ›

The ratio between fruit and sugar varies: with sweet fruits, it's about 2:1 (2 kilos of fruit, 1 of sugar), while with more bitter fruits like oranges, it should be more like 3:2. If uncertain, it's better to round up with the sugar. The other potential ingredients – lemon and pectin – are found in many jam recipes.

How do you loosen thick jam? ›

Spoon the overcooked jam into a large saucepan. Add 1 cup of water and bring the mixture to a boil over medium heat, stirring to incorporate all of the water. Cook until the gelling point has been reached. Spoon into clean jars and re-process in the water bath.

How do you make jam consistency? ›

7 Tips to Make Sure Your Jam Sets Up
  1. Understand pectin. Pectin is the fiber that holds up the cell walls of fruits and vegetables. ...
  2. Use a candy thermometer. ...
  3. Watch the way the jam drips. ...
  4. Use the freezer test. ...
  5. Watch and listen. ...
  6. Use a low or no sugar pectin. ...
  7. Give it time.

How do you keep jam from separating? ›

To prevent the separation use ripe fruit, and crush the berries into small pieces. Make sure to not overcook the fruit. Stir on and off for five minutes before putting the jam into jars, and make sure to follow the recipe exactly.

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