5. Fill the Jars with Water
Pour clean, filtered water into the jars, covering the blueberries entirely. Leave about 1 cm of space at the top to allow for expansion during heating.
6. Wipe the Jar Rims and Seal
Before sealing, wipe the rims of each jar with a clean cloth to ensure no fruit or juice interferes with the sealing process. Close tightly with clean, new lids.
7. Prepare for Pasteurization
Place a clean cloth or folded kitchen towel at the bottom of a large, deep pot. This prevents the jars from bumping into each other or the pan during the heating process.
Carefully place the jars upright into the pot. Then, fill the pot with water until it reaches just below the lids of the jars. It’s important not to cover the lids completely.
8. Pasteurize the Jars
Bring the water to a gentle boil. Once boiling, reduce the heat slightly and pasteurize the jars for 30 minutes. This heat will kill any lingering bacteria while keeping the fruit intact.
9. Let the Jars Cool Down in Water
After 30 minutes, turn off the heat and let the jars cool completely in the water. This gradual cooling process helps create a strong vacuum seal and prevents the jars from cracking.
10. Store in a Cool, Dark Place
Once completely cooled, remove the jars, dry them, and store them in a dark pantry or cupboard. Properly sealed jars can last several months, making them perfect for enjoying blueberries out of season.
Tips for Best Results
- Use only fresh, unbruised blueberries for the best texture and taste after preservation.
- Label each jar with the date you preserved them.
- Store in a place that is cool, dry, and away from sunlight to maintain quality.
- After opening a jar, refrigerate it and consume the contents within a week.
- Ways to Use Preserved Blueberries
Preserved blueberries are incredibly versatile! You can:
Add them to yogurt, oatmeal, or smoothies
Use as a topping for pancakes or waffles
Mix into baking recipes like muffins or cakes
Serve over ice cream or custards
Eat straight from the jar as a healthy snack
They retain much of their original texture and color, making them ideal for both sweet and savory uses.
Preserving blueberries in jars with lemon juice and water is a time-tested method that requires no fancy equipment or artificial preservatives. It’s a fantastic way to enjoy the taste and nutrition of blueberries all year round, reduce waste, and prepare natural food right at home.
⚠️ Disclaimer:
Always follow proper canning and preservation practices. If you notice bubbling, off smells, discoloration, or an unsealed lid after storage, do not consume the contents of the jar.
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