There are recipes that only work in summer, when the fruit is at its peak and nothing extra needs to be added. This sugar-free peach jam is one of them: isomalt instead of regular sugar, a homemade texture, and the true flavor of ripe fruit. Here’s the complete recipe, step by step.
Sugar-free peach jam with isomalt
If there’s one thing that tastes like summer, it’s the peach. Sweet, juicy, with that beautiful color and that aroma that’s already saying, “Make something delicious with me.”
Today we’re going to make a sugar-free peach jam, using isomalt instead of regular sugar. It’s a simple, homey recipe, perfect for using up ripe peaches when they’re at their best.
However, as I always like to explain things clearly: this jam doesn’t have any added sugar, but peaches do contain natural sugars. Also, isomalt is less sweet than sugar and doesn’t thicken in exactly the same way, so we’re going to adjust the recipe to achieve a rich, spreadable texture with a strong fruit flavor.
You can use it for toast, yogurt, tarts, cake fillings, dessert cups, or to add a different touch to a cheese board. Basically, one of these jars in the fridge will save you from more than one breakfast or afternoon snack.
Preparation time 10-15 minutes
Cooking time 30-40 minutes
Resting time: Minimum 2 hours. Ideally, let it cool completely before using. If you add chia seeds, the texture will improve even more after a few hours in the refrigerator.
Easy Difficulty
Quantity Approximately 3 small jars, depending on the amount of water in the peach and the cooking time.
Necessary utensils
- Large saucepan or pot
- Knife
- Cutting board
- Kitchen scale
- Spoon or spatula
- Mixer, optional
- Clean glass jars
- Colander, optional
Ingredients
- 1 kg of ripe peaches
- 180-200 g of granulated isomalt
- Juice of 1/2 lemon
- Optional: 1 teaspoon of chia seeds
- Optional: a few drops of liquid sucralose or stevia
- Optional: a pinch of vanilla or cinnamon
Before we begin
Choose ripe, but not overripe, peaches. They should be fragrant, juicy, and sweet. The better the fruit, the richer the jam will be.
You can peel them or leave some of the skin on if you want a jam with more color and a more rustic touch. If you want a very smooth jam, it’s best to peel them.
Wash the peaches well, peel them if you prefer, and remove the pit. Cut them into small pieces. They don’t need to be perfect, because they will soften during cooking.
If you like finding pieces of fruit in your jam, leave some slightly larger pieces. If you prefer a smoother jam, chop the fruit into smaller pieces from the start.
Cook the fruit and add the isomalt.
Place the chopped peaches in a saucepan along with the lemon juice. Cook over medium heat for about 10 minutes, stirring occasionally, until the fruit begins to release its juices and softens. The lemon enhances the peach flavor and also adds a touch of acidity that perfectly balances the recipe.
Stir in the granulated isomalt and mix well. Cook over medium-low heat for 25-35 minutes, stirring occasionally to prevent sticking.
You’ll see the mixture gradually thicken. The time it takes will depend on the water content of the peaches and the desired consistency.
Adjust the texture and package
Once the fruit is cooked through, you can leave the jam as is, with small pieces, or lightly blend it. For a smooth texture, blend with an immersion blender until you reach your desired consistency. If you prefer a chunkier jam, simply mash the fruit slightly with a wooden spoon.
If you want a thicker texture, add a teaspoon of chia seeds and cook for another 5 minutes. Chia seeds help thicken the jam easily, especially when not using regular sugar, as sugar also helps to thicken it. This step is optional, but it works very well.
Taste the jam carefully, as it will be hot. Isomalt is less sweet than regular sugar, so if you prefer a sweeter flavor, you can add a few drops of liquid sucralose or stevia. Add just a tiny bit, mix, taste, and adjust if necessary.
Pour the hot jam into clean, sterilized jars. Seal tightly and let cool to room temperature. Once cool, store in the refrigerator.
Conservation and replacements
Because this jam doesn’t contain a large amount of regular sugar, it doesn’t keep as well as traditional jam. Always store it in the refrigerator and consume it within 7-10 days. If you want to preserve it for longer, you’ll need to vacuum-seal it properly, using sterilized jars and following appropriate safety precautions.
You can substitute the peach with nectarine, flat peach, apricot, or a mix of summer fruits. You can use 180g of isomalt if you prefer a less sweet jam, or 200g if you want a richer flavor. Chia seeds are optional. You can substitute lime juice for the lemon juice, although the flavor will be slightly fresher and more acidic.
If you also work with isomalt in other preparations (figures, lollipops, decorations), you may be interested in having ready-to-use boiled isomalt on hand, which saves you the step of melting it from scratch.
Approximate nutritional information
Approximate values per 20g serving, calculated without chia seeds:
- Calories: 20-30 kcal
- Carbohydrates: 6-8 g
- Natural sugars: 2-3 g
- Polyols from isomalt: 4-5 g approx.
- Fats: 0 g
- Protein: 0 g
These values are indicative and may vary depending on the ripeness of the peach, the exact amount of isomalt used and the final reduction of the jam.
Important: This recipe contains no added sugar, but that doesn’t mean it’s carbohydrate-free. Peaches contain natural sugars, and isomalt should be consumed in moderation.
How to use this jam
This peach jam is delicious with:
- Toast
- Natural yogurt
- whipped fresh cheese
- Cheesecake
- Panna cotta
- Homemade ice cream
- Pie fillings
- Sweet little cups
- Cakes or muffins without added sugar
You can also use it as a base for a quick dessert: unsweetened Greek yogurt, a spoonful of this jam, and some nuts on top. Easy, delicious, and impressive.
Tips and tricks to make it perfect
Use ripe peaches. This recipe relies heavily on the flavor of the fruit, so the sweeter and more aromatic they are, the better.
Don’t put the heat too high. The jam needs to cook slowly so the fruit breaks down and thickens without sticking.
Isomalt is less sweet than regular sugar. If you want a sweetness closer to that of traditional jam, add a few drops of sucralose or stevia at the end.
If you want it thicker, add chia seeds. If you want it thinner, blend it at the end. If you like chunks, just mash the fruit slightly.
Lemon is important. It not only balances the sweetness, but also makes the peach flavor stand out more.
You can flavor it with vanilla, cinnamon, or even a little ginger. Peach pairs wonderfully with warm, spicy flavors.
One last piece of advice
This jam is one of those simple recipes that seem like nothing special… until you open the jar, taste it and think: “okay, I have to make this again.”
It’s homemade, easy, made with seasonal fruit, and has no added sugar. Perfect for adding a touch of sweetness to your breakfasts and desserts without using regular sugar.
And the best part: you can make it with peaches, but you can also adapt the same idea to apricots, nectarines, plums, or other berries. A basic, beautiful, and very summery recipe.
Frequently Asked Questions
Is this jam suitable for diabetics?
This jam has no added sugar and is made with isomalt, but peaches contain natural sugars. If it’s for someone with diabetes, it’s best to monitor the quantity and adjust the portion to their needs.
Why does it have lemon?
Lemon helps to balance the sweetness, enhances the flavor of the peach, and improves preservation for a few days in the refrigerator.
Can I make it without chia seeds?
Yes. The chia seeds are optional. The recipe can be made with just peach, isomalt, and lemon. The chia seeds simply add body.
Are the chia seeds noticeable?
A little, yes. If you prefer a finer texture, you can blend the jam after it has rested.
Why doesn’t it thicken like regular jam?
Because regular sugar helps thicken, preserve, and give that typical jam texture. Isomalt doesn’t behave exactly the same way, so we can use reduction, chia seeds, or a slightly longer cooking time.
Can I use peaches in syrup?
I don’t recommend it for this recipe, because it usually contains added sugar.
How long does it last in the refrigerator?
Ideally, it should be consumed within 5-7 days, always well covered and refrigerated.
Can it be frozen?
Yes. You can freeze it in small jars or in portions to use only the amount you need.
Can I use it to fill cakes?
Yes, but if you want it for filling cakes or sponges, I recommend making it a little thicker so that it doesn’t make the dough too wet.
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