This rich from-scratch blueberry jam is made with fresh blueberries, lemon juice, sugar, and pectin for a not-too-sweet summer treat you will want to slather on everything! Learn how to make and can blueberry jam with this straightforward-to-follow step-by-step guide.

Glass jar with blueberry jam overflowing over the top.

In all of the cooking, baking, and creating we have done since starting this website in 2007, we can honestly say that these jars of blueberry jam have given us the greatest sense of kitchen satisfaction since we mastered yeast bread.

Rich From-scratch Jam

Sometimes we rush around the kitchen with our mind in a million different places at once. When we make this jam, we slow down. It doesn't happen consciously, but we eventually become aware that we've allowed myself to become fully immersed in the process.

Crushing fresh blueberries, stirring the jam while it boils, carefully filling each hot jar with the mixture, and picking them up, one by one, once they're finished. We enjoy every step and can see how folks get into a serious canning habit. It's more than just filling jars with jelly or jam; it's a reminder that even though we're busy, every once and a while, we can allow life to slow down, be simpler, and be in the moment.

Canning Equipment

When we first considered canning, we were intimidated by the process and the extra equipment we thought we needed. In the end, we were thrilled about how wrong we were regarding the entire process and what was necessary to get started.

This is all you need:

Water Bath Canner
Canning Tools Set
8-ounce Jars

They also sell entire canning starter kits that include the large canning pot and all the accessories you need.

How to Make From-scratch Blueberry Jam

Prepare the Canner, Jars, and Lids: You will wash all of the equipment in hot, soapy water and then place the jars in the water bath canner and lids in a saucepan to simmer and keep warm while you prepare the jam.
Prepare the Jam: Crush or mash your blueberries using a fork or potato masher, then combine them in a saucepan with the lemon juice and sugar. Bring it to a boil, then add the pectin and boil for a minute longer.
Can the Blueberry Jam: Fill the jars with jam, add the lids and screw bands, then place the jars in the canner.
Seal the Jars: Fill the canner with water to cover the jars, then bring to a full rolling boil and continue boiling for 10 minutes. After they sit for 5 minutes, remove the jars and allow them to sit in a draft-free place for 24 hours.
Check the Jars: When processed jars have cooled for 24 hours, check the lids for a secure seal. To do this, press down on the center of each lid. Sealed lids will be concave (they’ll curve downward) and will show no movement when pressed.

Common questions

Storing and Freezing Directions

After you have made your jam, you will want to make sure you properly store it for peak freshness.

Sealed Jars: Store jars with a proper seal (see indicators in "Step 5: Check the Jars" to know if the jar has a proper seal) in a cool, dry place for up to 1 year.
Opened Sealed Jars: After you have opened a sealed jar of jam, it will keep refrigerated for up to 3 months.
Unsealed Jars: Keep jars that did not properly seal in the refrigerator and use them within 3 weeks.
Freezing Directions: Place cooled and cleaned jars of blueberry jam in the freezer for up to 1 year. Thaw in the refrigerator before using.

Ways to Use Blueberry Jam

Slather on toast (made with our white bread recipe!), English muffins (or English muffin bread), or buttermilk biscuits.
Use it to top buttermilk waffles, fluffy pancakes, French toast, and baked oatmeal.
Stir it into vanilla ice cream or yogurt.
From-scratch jam makes a great gift! Package with a pretty ribbon and customized label (you can find some great ones on Etsy!) and share with family and friends for the holidays, a birthday, a teacher gift… any occasion!

Blueberry Jam

Yield: 8 (8-ounce) jars
Prep: 2 hours 20 minutes
Cook: 40 minutes
Total: 3 hours

Ingredients

4½ cups ( 698 g ) crushed blueberries
4 tablespoons lemon juice
7 cups ( 1386 g ) granulated sugar
6 ounces liquid pectin

Method

Prepare canner, jars and lids. Wash the jars, lids and screw bands in hot, soapy water. Rinse well and drain (you don’t need to dry them). Place a rack in the bottom of a boiling-water canner, then place the required number of jars on the rack. Add water to the jars and the canner until it reaches the top of the jars. Cover the canner and bring the water to a simmer (180 degrees F) over medium heat. Do not boil the jars. Keep jars hot until you’re ready to use them. Place the lids in a small saucepan, cover with water and bring to a simmer (180 degrees F) over medium heat. Again, do not boil the lids. Keep lids hot until you’re ready to use them. Set the screw bands aside, they do not require heating.
In a large, deep stainless steel saucepan, combine crushed blueberries, lemon juice and sugar. Over high heat, stirring constantly, bring to a full rolling boil that cannot be stirred down. Stir in the pectin. Boil hard, stirring constantly, for 1 minute. Remove from the heat and skim off any foam.
Working with one jar at a time, remove a jar from the canner, pouring hot water back into the canner. Place the jar on a heat-protected work surface, such as a wooden cutting board or towel. Ladle the hot jam into hot jars, leaving ¼-inch headspace. Slide a nonmetallic utensil, such as a rubber spatula, down between the food and the inside of the jar two or three times to release air bubbles. Adjust headspace, if necessary, by adding more hot jam. With a clean damp cloth or paper towel, wipe jar rim and threads. Using a magnetic or nonmetallic utensil, lift a hot lid from the water and place it on the jar, centering the sealing compound on the rim of the jar. Place a screw band on the jar. With your fingers, screw band down until resistance is met, then increase to fingertip-tight. (Do not use excessive force to tighten.) Return the jar to the rack in the hot water-filled canner. Repeat filling steps until all jars are filled.
When all of the jars are in the canner, adjust the water level in the canner so that it covers the jars by at least 1 inch. Cover the canner with a lid and bring the water to a full rolling boil over high heat. Once the water is boiling hard and continuously, process (continue boiling) for 10 minutes. Turn off the heat, remove the lid and let sit for 5 minutes. After 5 minutes, remove the jars, lifting them out of the hot water without tilting them. don’t dry the lids or jars at this point. You don’t want to disturb the lids while the seal is being formed. Place the jars upright on a towel in a draft-free place and let cool, undisturbed, for 24 hours.
When the processed jars have cooled for 24 hours, check the lids for seal. Remove the screw bands and with your fingers, press down on the center of each lid. Sealed lids will be concave (they’ll curve downward) and will show no movement when pressed. Jars that have not sealed properly must be refrigerated immediately. Use unsealed refrigerated product within a few days. For the jars that have good seals, with a damp cloth, thoroughly wipe lids and jar surfaces to remove any water residue or food particles. Store the sealed jars of jam in a cool, dark place for up to 1 year.

Notes

Equipment: Canning pot / Canning essentials set / 8-ounce jars

Liquid Pectin: we found this in our local grocery store where they had a little display with jars, lids, and canning accessories. It can also be purchased online.

Sugar Substitutes: You can substitute 3½ cups of honey for the sugar OR 2 tablespoons + 1 teaspoon Stevia.

Storing Sealed Jars : Store jars with a proper seal (see indicators in “Step 5: Check the Jars” in the post above to know if the jar has a proper seal) in a cool dry place for up to 1 year.

Opened Sealed Jars : After you have opened a sealed jar of jam it will keep refrigerated for up to 3 months.

Unsealed Jars : Keep jars that did not properly seal in the refrigerator and use them within 3 weeks.

Freezing Directions : Place cooled and cleaned sealed jars of blueberry jam in the freezer for up to 1 year. Thaw in the refrigerator before using.

Canning Alternative: If you cannot procure the necessary equipment for long-term storage, you can still make this recipe. Use refrigerated jam within 3 weeks or freeze for up to 6 months, then transfer to the refrigerator and use within 3 weeks of thawing.

Recipe adapted from Ball Complete Book of Home Preserving

Photography by Dee Frances.