Water Bath Canning Strawberry Jam 🍓
INGREDIENTS
5 cups crushed strawberries (about 3 lbs.)
1/4 cup bottled lemon juice
6 Tbsp. Ball® RealFruit™ Classic Pectin
7 cups granulated sugar
DIRECTIONS
FIRST, LET'S PREP!
Prepare boiling water canner. Heat jars in simmering water until ready for use. Do not boil. Wash lids in warm soapy water and set bands aside.
NEXT, TIME TO COOK!
Combine strawberries and lemon juice in a 6- or 8-quart saucepan. Gradually stir in pectin. Bring mixture to a full rolling boil that cannot be stirred down, over high heat, stirring constantly.
Combine strawberries and lemon juice in a 6- or 8-quart saucepan. Gradually stir in pectin. Bring mixture to a full rolling boil that cannot be stirred down, over high heat, stirring constantly.
NEXT, LET'S CAN IT!
Ladle hot jam into a hot jar leaving a ¼ inch headspace. Remove air bubbles. Wipe jar rim. Center lid on jar and apply band, adjust to fingertip tight. Place jar in boiling water canner. Repeat until all jars are filled.
Process jars 10 minutes, adjusting for altitude. Turn off heat, remove lid, let jars stand 5 minutes. Remove jars and cool 12-24 hours. Check lids for seal, they should not flex when center is pressed.
Happy canning!
Water bath canning is an excellent method to preserve homemade strawberry jam while ensuring food safety and flavor retention. From my own experience, making jam with fresh, crushed strawberries combined with lemon juice, pectin, and sugar allows you to control the sweetness and texture perfectly. Using Ball® RealFruit™ Classic Pectin helps achieve that ideal gel consistency which some homemade recipes can miss without commercial pectin. Before starting the canning process, it’s important to properly prepare your jars by warming them in simmering water—not boiling—to prevent cracking and ensure a good seal later. When cooking the jam mixture, watch closely for a full rolling boil. This means the liquid continues boiling vigorously even when stirred, which activates the pectin properly. During ladling the hot jam into jars, leaving a ¼ inch headspace is crucial because it allows for expansion while processing in the boiling water canner. Removing air bubbles by gently poking the jam with a non-metallic spatula ensures less chance of spoilage or seal failure. Also, wiping the jar rim clean before placing the lid prevents jams or sugars from interfering with the vacuum seal. Processing the jars for about 10 minutes is a safe and tested time frame for strawberry jam. Adjusting for altitude is also important — higher elevations require longer processing times due to lower boiling temperatures. Once processed, letting jars rest in the canner without the lid for five minutes prevents liquid from bubbling out. Finally, cooling the jars undisturbed for 12-24 hours helps seals to set firmly. The best sign of a successful seal is when the lid does not flex up or down when pressed in the center. Any jars that fail to seal can be refrigerated and enjoyed promptly. This water bath canning method not only preserves the jam for months but also locks in that fresh strawberry flavor, making every spoonful delicious. Plus, homemade strawberry jam makes a great gift or addition to your pantry staples!
