Can you cook jam in a slow cooker? 

In this brief guide, we’ll focus on addressing the query “Can you cook jam in a slow cooker?” We’ll also provide a brief overview of how jam can be made in a slow cooker, what jam is, and how it is made, and we’ll discuss the nutritional aspect of consuming jam. 

Can you cook jam in a slow cooker? 

Yes, jam can be cooked in a slow cooker. As a product that requires cooking, it can be prepared in a slow cooker and is considered to be well-cooked when it reaches a temperature of 220°F (~ 105 °C). 

How can I make jam in a slow cooker?

Making jam in a slow cooker requires fruit (of the reader’s choice), pectin (if using low acid fruit), lemon juice, sugar, and additional spices (if so desired). 

The first step is to wash the fruits under running water. Once clean, it can be cut and crushed, heated, and boiled to ensure flavor and quality. To be clear, the cooking time may vary from fruit to fruit, and additional time while boiling may be necessary if using fruits like apples, which can require up to twenty minutes of cooking time. 

All the ingredients can be added to the crockpot, and covered with water, as a reference, for four medium-sized fruits (at about 120 grams each) two cups of water will be used.  

The mixture can be left to slow cook for 8-10 hours at a low setting, and for 4-6 at high. Fruits with shorter cooking times such as berries and drupes can be cooked at a low setting for 6-8 hours or at a high for 2-4 hours. 

Once finished, the mixture should hold together and is ready to be bottled or used as a spread. If bottled, it should quickly be placed into a jar, sealed, and heated in a bain-marie to ensure that no mold or other microorganisms settle in.

What is jam?

Jam is a food preserve made out of fruits (which indicate the flavor), sugar, and may or may not have added pectin (which is a fiber commonly found in the peels of fruits like apples, plums, and in the pulp of citrus fruits) that when mixed with water, forms a gelatinous phase. 

Jams differ in ingredients, consistency, and how the fruit is primed for preparing them, which can be done industrially, or domestically. 

There are a wide variety of commercially available flavors, whose availability varies from region to region. These include apricot, blackberry, boysenberry, dewberry, loganberry, red raspberry, youngberry, blueberry, cherry, currant, fig, gooseberry, grape, orange marmalade, peach, pear, plum, rhubarb, strawberry, and spiced tomato. 

How is jam made? 

Conventionally, Jam is made with four essential ingredients which are fruit, pectin, acid, and sugar. 

Fruit– provides the end product with its distinct color and flavor, it should be firm, disease-free, and ¾ of the total volume to be used should be ripe, with the remaining quarter slightly underripe. Using frozen fruit may lessen the acidity and pectin available from it. If using unsweetened frozen fruit, it may be necessary to add commercially available pectin. 

Pectin – this fiber helps the product gel and hold its shape.

Acid– present in fruits- is necessary for the gel to form and for flavor, though sometimes additional acid may be necessary to complement the mixture. 

Sugar– aids with the product’s gelling, adds sweetness, and binds the liquid, making it difficult for microorganisms to grow in it. 

The first step is to crush the fruit, boil it and extract the juice for its immediate use. 

Depending on the pectin content of the fruit being used, it may or may not be necessary to add commercial pectin. If the fruits are high in acid, no pectin is needed, and vice versa. 

The acid will then be added if most of the fruit used is low in acid concentration. The right amount is necessary for the pectin to set and the product to gel. Acid can be added by mixing citric acid or bottled lemon juice with the fruit and pectin. 

Finally, sugar is added to give the product its sweet flavor, color, and taste. Half the volume of the fruit being used is the necessary amount of sugar to add-in. White granulated sugar is best for making jam, while brown sugar or molasses are not recommended (their flavor overpowers that of the fruit), though commercially, most recipes use corn syrup. 

Jam products are packaged into sterilized jars and processed in a boiling water bath to ensure that no microorganisms are present in the mix. 

What are the nutritional properties of jam

Jam is a rich source of calories– due to its high sugar content. As such, it should be consumed sparingly, especially by people concerned with moderating their sugar intake and glucose levels.  


In this brief guide, we focused on addressing the query “Can you cook jam in a slow cooker?” We also provided a brief overview of how jam can be made in a slow cooker, what jam is, and how it is made, and we discussed the nutritional aspect of consuming jam. 


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Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.