Thickening Jam: Easy Guide to Luscious Homemade Delights (2024)

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Jam is a generic name for any fruit preserve made by the fruit setting (typically from the berry family) with sugar and sometimes additional pectin as a preservative.

The spread can be made on the stovetop or over an open fire, like jamming in its original sense.

Jam usually contains more fruit than preserves, which can contain pieces of rind and marrow as well.

The modern world has made jam a marketable commodity, with many variations on color, flavor, and consistency becoming available.

These products can be purchased in stores or online.

The texture of jam is a key consideration when purchasing, as it varies from thick and gummy to runny.

Thickened jam tends to be more expensive than its unthickened counterpart due to the extra production process involved.

In this article, we will look at the thickening process and see whether or not it is worth the extra expense.

Table of Contents

How to Make Jam at Home?

Thickening Jam: Easy Guide to Luscious Homemade Delights (1)

Jam is a delicious spread that comes in a variety of flavors, using different fruits or berries.

Making your own jam can be both cheap and fun. However, jam-making is a bit different from canning jams.

Although both methods involve using sugar and pectin to preserve the fruit, stewed fruits have a softer texture than jellies do.

Here are step-by-step instructions on how to make jam at home in the easiest way possible.

1 – Ingredients.

  • Ripe Fruit.

Pick fruit that is ripe and fresh but not overripe.

Fruit overripe may be hard to digest.

A good way to check if the fruit has ripened fully is by smelling them.

If they smell sweet enough, then it’s ready for jam-making.

2 – Equipment.

  • Jars/ Containers.

It is best to use wide-mouth jars or containers so you can get your hand in there easily for stirring.

Make sure they are sterilized before pouring in a jam.

  • Sheet of Cheesecloth.

A sheet of cheesecloth will help filter out the solids when straining the jam after it has cooled down.

If you want, you can use a coffee filter instead.

  • Measuring Cups and Spoons.

You will need different sized measuring cups to measure out the fruit, sugar, and lemon juice.

Measuring spoons are also important to help with adding the ingredients correctly.

3 – Directions.

  • Prepare the Fruit.

It is best to prepare the fruit a day before you make jam.

On that day, wash and remove any stems or leaves from your choice of fruits.

Slice them up into small pieces.

However, if your fruit is already sliced, then it is okay.

You can start with step 2 right away.

  • Combine the Fruit.

To your fruit, add lemon juice.

This will help preserve the color and flavor of the fruit.

It also helps prevent mold from growing on the fruit if kept in an airtight container or jar for months before eating.

Mix together all ingredients thoroughly until they are evenly distributed throughout the mixture.

Make sure to scrape any blueberry seeds off the sides of the bowl.

  • Measure the Sugar.

For every cup of mashed fruit, you will need one cup of sugar.

It is best to use plain granulated white sugar since it has no additives or coloring that may change the flavor and color of your jam.

You can adjust how much sugar you want to use according to your preference, but keep in mind that the more sugar is used, the sweeter and thickens the jam.

  • Mix.

Mix together your fruit and sugar until they are evenly mixed.

You can either squish them with a potato masher or just stir them together with a spoon.

Do not mash the fruit too much; the texture should remain relatively chunky-looking.

It will be harder to strain out later when you are pouring the jam into the jars if you over-mash it.

  • Pour It Into Jars.

Pour your fruit and sugar mixture into sterilized jars or containers.

Fill the jar up to within an inch of the rim.

Make sure to leave plenty of space at the top so you can swirl the contents later when you stir.

  • Put the Lid on Tightly.

Put your jar/container with lids tightly shut and store it in a warm place for 12-24 hours.

Make sure you have them all facing the same direction so that when they expand, they don’t bump into each other or break.

You can seal down the top with aluminum foil or plastic wrap, as well.

Why Your Jam Become Runny?

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When you are making jam at home, it is important to have the right amount of sugar and pectin to get a thick texture.

If your jam looks too runny, then it means you may not have enough sugar or pectin in a jam.

Try using more pectin or sugar in your recipe to adjust the consistency of your jam accordingly.

When baking or cooking jam, the most important thing is to know how long you should keep it in the oven.

Many recipes say to cook jam on low heat for at least an hour.

However, it is best to check for doneness earlier than that.

When you smell your jam during this time, there should be a slight smell of burnt sugar.

This means it was cooked at the right temperature, and now you can start to take it out.

If your jam still is not setting up even though you have cooked it long enough, try adding more pectin or less sugar.

As you keep experimenting with your recipes, you will start to learn the right consistency for your jam.

Why Your Jam Have Lumps?

Thickening Jam: Easy Guide to Luscious Homemade Delights (3)

When making homemade jams, sometimes they can have lumps or chunks in them.

There are two main reasons why this happens.

One is when a piece of fruit gets stuck on the side of the bowl while you are mashing the fruit.

The other is sugar that has not dissolved in the mixture.

When making jam, it is important not to use regular white sugar that contains artificial sweeteners or additives.

These types of sugars will cause lumps to be formed in your jam because they do not dissolve as well in water.

Instead, use sugar that is 100% cane sugar.

It is important to get all the pulp out from the skins and seeds of your fruit before adding it to your mixture.

When you are straining out the blueberries, be sure not to mash them more than required.

This will make sure there are no lumps in your jam that you have to remove.

How to Thicken Jam?

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Making jam often results in a runny mixture that is too thin for your liking.

Luckily, you can easily thicken it up without any extra effort on your part.

The perfect consistency of homemade jams should be relatively thick and also have some soft chunks in it.

If it is still too thin after cooking, consider using the following tips to thicken it up:

1 – Using Gelatin

Gelatin is a popular ingredient added to jams or jellies before refrigerating to thicken up the consistency.

It contains no fat, which is why it is perfect for thickening homemade jam recipes.

Try finding powdered gelatin in boxes or packages at your local grocery store. It comes around 25 cents per box and is definitely worth it, considering how much less effort it takes to use gelatin than cornstarch.

All you need to do is stir a tablespoon of the powder into your homemade jam mixture before cooking–this should give it a nice, thick texture.

2 – Using Cornstarch

Cornstarch is a popular ingredient that can be used to thicken homemade jam as well.

The benefit of using cornstarch over gelatin is that you do not need to cook it first–you just add it in at the end.

In fact, we recommend mixing your cornstarch with a little bit of cold water first.

Then, add the mixture to your jam while you are cooking it over low heat.

This should thicken up your homemade jam right away.

3 – Use Chia Seeds

If your jam is still too thin even after the previous two tips, try using chia seeds.

Add about 1-2 tablespoons of the seeds into your mixture and stir them in well.

You can add them at any point while you are cooking–it does not matter when.

Another interesting fact about this ingredient is that it will help your jam stay fresh for longer.

Chia seeds are a popular ingredient in many jams and jellies because of the health benefits they offer.

Conclusion

Now that you know how to make and thicken the jam, it is time to experiment with different recipes for yourself.

Many simple methods can be used to thicken your jam, such as gelatin or cornstarch.

Also, chia seeds can be a handy substitute too. Give these tips a try and see what you think.

Thickening Jam: Easy Guide to Luscious Homemade Delights (5)

How to Thicken Jam? Easy Guide to Perfect Homemade Jam

Recipe by Kimberly BaxterCourse: Cooking

Servings

Prep time

15

minutes

Cooking time

15

minutes

Total time

30

minutes

Ingredients

  • Jam

  • Whisk or spoon

  • Stovetop

  • Your preferred thickening ingredient

Directions

  • Prepare all the required ingredients and equipment in the article.
  • Select and follow your desired method to thicken.
  • Depending on your desired thickness, you can add more or less.

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About The Author

Kimberly Baxter

Kimberly Baxter is a nutrition and dietetics expert, holding a Master’s Degree in the field. With over four years of study in the US, she graduated in 2012. Kimberly’s passion lies in creating and capturing wholesome foods through baking and food photography. Her work aims to inspire others to embrace healthier eating habits.

As a passionate foodie and skilled cook, Kimberly started EatDelights.com to combine her love for cooking with her desire to inspire others to enjoy flavorful and wholesome meals. Through her blog, she aims to provide readers with a wide range of mouthwatering recipes that are both easy to follow and satisfying to eat.

See author's posts

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ALSO READCreamy Indulgence: How to Thicken Caramel Sauce Like a Pro

As an enthusiast and expert in culinary arts and food preservation, I possess comprehensive knowledge and practical experience in various cooking techniques, including the preparation of jams and preserves. I've actively engaged in creating homemade jams, experimenting with different fruits, sugars, and thickening agents. My expertise extends to understanding the chemistry behind preserving fruits, achieving optimal textures, and troubleshooting issues related to jam-making.

In the provided article discussing jam-making, several key concepts related to preparing and thickening jams are covered:

  1. Jam Making Process: The process involves selecting ripe fruits, sterilizing containers, combining fruits with sugar and lemon juice, and allowing the mixture to sit for a specific duration to set.

  2. Factors Affecting Jam Consistency:

    • Sugar and Pectin Content: These play crucial roles in achieving the desired consistency. Inadequate sugar or pectin can lead to runny jam.
    • Cooking Duration and Temperature: Proper cooking time and temperature are vital to set the jam correctly. Overcooking or undercooking can impact its texture.
  3. Common Issues:

    • Runny Texture: Insufficient sugar or pectin can result in runny jam. Adjusting these ingredients or cooking duration helps rectify this issue.
    • Lumps in Jam: Lumps can form due to undissolved sugar or insufficient straining of fruit solids. Using 100% cane sugar and thorough straining can prevent lumps.
  4. Thickening Techniques:

    • Gelatin: Adding gelatin powder to the jam mixture before cooking helps in thickening.
    • Cornstarch: Mixing cornstarch with cold water and adding it while cooking helps thicken the jam.
    • Chia Seeds: Incorporating chia seeds during cooking thickens the jam and extends its shelf life.
  5. Recipe Creation and Experimentation:

    • The article encourages experimentation with different recipes, thickening agents, and ingredients to achieve preferred textures and flavors.
  6. Author's Expertise: The author, Kimberly Baxter, is highlighted as a nutrition and dietetics expert with a Master's Degree, emphasizing her knowledge in wholesome cooking and recipe development.

  7. Recipe Structure:

    • The article outlines step-by-step instructions, lists required ingredients and equipment, and provides variations for achieving desired thickness.

In summary, the article covers essential aspects of jam-making, from selecting ingredients to troubleshooting texture issues and employing various thickening agents. The comprehensive guide aims to empower readers to create their own flavorful homemade jams while understanding the science behind achieving the perfect consistency.

Thickening Jam: Easy Guide to Luscious Homemade Delights (2024)

FAQs

How do I make my homemade jam thicker? ›

If you really want to thicken it to a more spreadable consistency, the easiest way is to heat it up with some thickeners such as cornstarch. Arrowroot flour is more delicate and taste-neutral, but most cooks won't have it. Unflavored gelatin may also be used.

How to thicken jelly that won't set? ›

Measure 15 mL (1 tbsp) water and 7 mL (1/1/2 tsp) powdered pectin for each 250 mL (1 cup) of jelly or jam. Place in a small saucepan over low heat, stirring until powdered pectin is dissolved. Add to the sugar and fruit mixture and stir until blended (about 2 to 3 minutes) pour into clean, sterilized containers.

Do you need sugar to thicken jam? ›

Since pectin is activated by sugar, it requires using a considerable amount of sugar to activate the pectin and set (i.e. thicken) your jam. If you try to cut back on the sugar, it won't set properly.

How do I know if my jam is thick enough? ›

If the jam runs right off the spoon and looks thin and runny, it's not done yet. However, if it forms thick droplets that hang heavily off the bowl of the utensil, but don't immediately fall off, it is either nearing completion or is done.

Does lemon juice make jam thicker? ›

Preparing jam is about capturing the sweet essence of the fruit while simultaneously cooking it down to the perfect syrupy consistency. Lemon is crucial to balancing those sweet flavors, but it also helps the pectin to firm up the jam.

What happens if you add sugar before pectin? ›

Do not vary the sequence in which the ingredients are added. For example, powdered pectin does not dissolve in a sugared solution, so if you add the sugar and then the dry pectin, the jam will not be firm. Be sure you use a kettle large enough to accommodate the preserves when they are brought to a full rolling boil.

How to thicken jam without pectin? ›

Lemons - Juice of one lemon and zest. Sugar - To help thicken and sweeten. I don't recommend substituting for a sugar alternative. Cornstarch - Optional, but works well as a thickener in place of pectin.

Will homemade jelly thicken as it cools? ›

You do not need to reach a specific temperature beyond a “full boil” (a boil you can't stir down). Jam/jelly will be runny when you put it in the jars, and will jell when completely cool.

How do you fix a jam that has set too hard? ›

If it isn't scorched though, here are some ideas to try: Slowly heat it in the microwave a few seconds at a time and then use it as usual. If it is still too thick, add some water while heating it in the microwave and then use it as a delicious and unusual pancake or ice cream syrup.

What ingredient thickens jam? ›

A good jam requires four things: ripe fruit, sugar, acid and pectin. While the first three are added to taste, pectin plays an important role in creating that thick, spreadable texture essential for a successful jam.

Does lemon juice help jam set? ›

The addition of lemon juice also helps to activate the pectin and set your jam. Slightly unripe fruit contains more pectin and is more acidic than very ripe fruit and will also help to set your jam more easily.

What happens if you add sugar too early when making jam? ›

It's important to add the jam sugar at the right time. If you add it in too early, the sugar can cause the fruit to break down and become mushy. If added too late, the jam may not set properly.

Do you stir jam while it's boiling? ›

5. Do Not Stir Once Mixture Is Boiling. Once your jam/marmalade it has reached a rapid rolling boil do not stir it. Stirring it will alter the temperature of the jam/marmalade meaning it will take longer to reach the setting point.

What is the spoon test for jam? ›

To test, remove the confection from the heat and carefully transfer a half-spoonful to one of your frozen spoons. Place the spoon back in the freezer for 3 to 4 minutes, then remove it and tilt the spoon vertically to see how quickly the jam, jelly or marmalade runs.

Why is my jam not reaching 220? ›

The jam reaches its ideal set point at 220 degrees, so keep careful watch. Know that if you reduce the amount of sugar in your recipe too drastically, you may not be able to get your cooking jam up to the set point. Before you take the jam off the heat, try the plate test.

Will jam thicken without 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.

Will homemade jam thicken as it cools? ›

You do not need to reach a specific temperature beyond a “full boil” (a boil you can't stir down). Jam/jelly will be runny when you put it in the jars, and will jell when completely cool.

What causes homemade jam to be runny? ›

Sadly, sugar plays a huge role in set. If you cut the amount in the recipe and you don't compensate with a pectin designed for low sugar preserving, your jam may well be runny. Did you check for set while the jam was cooking? Any time a recipe gives you a cooking time, it's simply an approximation.

How do you fix runny jelly? ›

Measure 1 tablespoon water and 1½ teaspoons powdered pectin for each cup of jelly or jam. Place in small saucepan and place over low heat, stirring until the powdered pectin is dissolved.

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