Canning collard greens is an excellent way to preserve their fresh flavor and nutritional value for months. Using a pressure canner ensures safety by reaching the temperatures needed to kill harmful bacteria in these low-acid greens. This recipe guides you through the step-by-step process to enjoy your collards year-round.
Ingredients
- 2 pounds fresh collard greens (washed and trimmed)
- 5 cups boiling water (for blanching)
- 5 cups boiling water (for packing)
- 1 teaspoon salt (optional, for flavor and preservation)
- Clean canning jars (quart or pint size), lids, and bands
- Pressure canner with dial or weighted gauge
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Instructions
- Prepare the collard greens: Remove the thick stems and tough ribs from the collard leaves, then wash thoroughly to remove dirt and grit. Cut leaves into 1-inch wide strips or your preferred size for packing.
- Blanch the greens: Bring 5 cups of water to a boil in a large pot. Submerge the collards in boiling water for 3 minutes to stop enzymatic action and preserve color and texture. Immediately transfer the greens to a bowl of ice water to cool quickly. Drain well.
- Prepare jars and lids: Sterilize your canning jars by boiling them in water or running them through a dishwasher cycle. Keep the jars hot to prevent cracking when filled. Simmer lids in hot water (not boiling) to soften the sealing compound.
- Pack the jars: Place the blanched collard greens into hot jars, leaving about 1-inch headspace at the top. Pour boiling water over the greens, maintaining the 1-inch headspace. Add 1/2 teaspoon salt per pint or 1 teaspoon per quart if desired. Remove air bubbles by running a non-metallic spatula around the jar’s inside edge.
- Seal jars: Wipe jar rims with a clean, damp cloth to ensure a proper seal. Place lids on the jars, then screw on the metal bands fingertip-tight—do not overtighten.
- Process in pressure canner: Add 2 to 3 inches of water to your pressure canner (follow manufacturer instructions). Load jars onto the rack, seal the canner lid, and vent steam for 10 minutes to remove air. Then close the vent and bring pressure to 10 pounds (psi) at sea level. Process pint jars for 35 minutes and quart jars for 40 minutes.
- Cool and store: After processing, turn off heat and let pressure return to zero naturally. Remove the lid carefully, then lift out jars and place them on a towel or cooling rack. Let cool undisturbed for 12 to 24 hours. Check seals before storing.
Tips
- Altitude adjustments: If you live above 1,000 feet elevation, increase the pressure according to your canner’s instructions (usually 15 psi above 1,000 feet or 11 psi above 6,000 feet).
- Salt is optional: Adding salt enhances flavor but is not necessary for safety. Omit if you are on a low-sodium diet.
- Use a pressure canner only: Because collard greens are low-acid vegetables, boiling water bath canning is unsafe and can lead to foodborne illness.
- Don’t overfill jars: Leaving proper headspace is crucial to allow for expansion and proper sealing during processing.
Serving Suggestions
Canned collard greens can be served as a quick side dish—simply heat and season with a splash of olive oil, garlic, or smoked paprika. They also make a nutritious addition to soups, stews, or casseroles, offering a tender green texture without the need for long cooking. For a Southern-style meal, serve alongside cornbread and smoked meats.
Variations
You can experiment by adding a few slices of jalapeño or a pinch of red pepper flakes to the jars before processing to infuse a mild heat. Another variation is to can collard greens with a splash of apple cider vinegar in the packing liquid for a tangy twist, but note this may require adjusting processing times slightly. For a heartier flavor, include diced onions or garlic cloves in the jars.
Storage and Reheating
Store your sealed jars in a cool, dark, and dry place such as a pantry or cellar. Properly canned collard greens will maintain best quality for up to 12 months. After opening, refrigerate leftovers and consume within 3 to 5 days. To reheat, warm gently on the stove or in the microwave until heated through. Avoid boiling canned greens after opening, as it can degrade texture.
Frequently Asked Questions
Can I can collard greens without blanching?
Blanching is recommended to preserve color, flavor, and texture and to reduce bacterial load. Skipping blanching may result in lower quality and potentially unsafe preservation.
Why must I use a pressure canner instead of a water bath?
Collard greens are low-acid vegetables and require processing at temperatures above boiling water (240°F or 116°C), achievable only in a pressure canner, to destroy Clostridium botulinum spores and ensure safety.
How do I know if my jars sealed properly?
After cooling, the lid should be concave and not flex upward when pressed. If the lid pops or jars leak, refrigerate and use those collards within a few days or reprocess with new lids.
Can I use frozen collard greens for canning?
It’s best to use fresh collard greens for canning. Frozen greens have already been cooked or blanched, which affects texture and safety during canning.
What if I don’t have a pressure canner?
Without a pressure canner, safely preserving collard greens by canning is not possible. Consider freezing or pickling as alternative preservation methods.
Can I add seasonings or broth to the jars?
Adding salt is fine, but avoid adding oils, fats, or thickened sauces as they can interfere with heat penetration and create unsafe conditions during processing.
By following these guidelines, you can enjoy the fresh taste and nutrition of collard greens long after harvest, safely and conveniently preserved in your pantry.
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