Safety classification
Tested
Testing authority: National Center for Home Food Preservation
Safety reviewed: 09/20/2026
Processing details
Altitude adjustment: Use the exact altitude-adjusted schedule in the cited recipe card.
Safety classification
Tested
Testing authority: National Center for Home Food Preservation
Safety reviewed: 09/20/2026
Processing details
Altitude adjustment: Use the exact altitude-adjusted schedule in the cited recipe card.
Tested source
Tested source. NCHFP Pickled Pearl Onions
Preparation timeline
- Prepare hot pint jars and lids. To peel onions, dip a few at a time in boiling water for 30 seconds, then cold water for 30 seconds. Trim 1/16 inch from each end and remove the peel.
- Combine vinegar, water, salt, and sugar in an 8-quart pot. Boil gently 3 minutes. Add onions, return to a boil, reduce heat, and simmer until half-cooked, about 5 minutes.
- Place 2 teaspoons mustard seed and 1 teaspoon celery seed in each hot pint jar. Fill with onions, leaving 1-inch headspace; cover with hot liquid, leaving 1/2-inch headspace. Remove bubbles, adjust headspace, wipe rims, and apply lids.
- Process pints in a boiling-water canner for 10 minutes at 0–1,000 ft, 15 minutes at 1,001–6,000 ft, or 20 minutes above 6,000 ft. Cool 12 to 24 hours and check seals.
- For best flavor, let processed jars stand 3 to 5 days before serving.
Equipment
- Boiling-water canner
- Canning jars
- Two-piece
canning lids - 8-quart stockpot
Visual method guide
- Prepare: Prepare hot pint jars and lids. To peel onions, dip a few at a time in boiling water for 30 seconds, then cold water for 30 seconds. Trim 1/16 inch from each end and remove the peel.
- Combine or cook: Combine vinegar, water, salt, and sugar in an 8-quart pot. Boil gently 3 minutes. Add onions, return to a boil, reduce heat, and simmer until half-cooked, about 5 minutes.
- Fill: Place 2 teaspoons mustard seed and 1 teaspoon celery seed in each hot pint jar. Fill with onions, leaving 1-inch headspace; cover with hot liquid, leaving 1/2-inch headspace. Remove bubbles, adjust headspace, wipe rims, and apply lids.
- Process: Process pints in a boiling-water canner for 10 minutes at 0–1,000 ft, 15 minutes at 1,001–6,000 ft, or 20 minutes above 6,000 ft. Cool 12 to 24 hours and check seals.
Safety summary
A tested NCHFP boiling-water
Safety classification: Research-tested home-canning recipe. Use 5% vinegar and follow the specified proportions, pint jar size, headspace, and altitude-adjusted processing.
Do not dilute the vinegar, alter tested proportions, overcook the onions before packing, or use larger jars. No other change is presented here as safe unless the original tested source expressly permits it.
Simmer onions only until half-cooked. For best flavor, let sealed jars stand 3–5 days before serving. If a jar does not seal, refrigerate promptly or reprocess within 24 hours with a new lid and the full tested process.
Editorial review: Safety-critical values are tied to the cited source and must survive imports and audits.
About this recipe
A tested NCHFP boiling-water
Before you begin
- Method
- Boiling-water
canning - Headspace
- 1-inch headspace
- Recipe standard
- Use the complete formula and directions in the recipe card.
Safety classification
Tested
Testing authority: National Center for Home Food Preservation
Safety reviewed: 09/20/2026
Processing details
Altitude adjustment: Use the exact altitude-adjusted schedule in the cited recipe card.
Pickled Pearl Onions — NCHFP
Ingredients
- 8 cups peeled white pearl onions about four 10-ounce bags unpeeled
- 5 1/2 cups white distilled vinegar 5% acidity
- 1 cup water
- 2 tsp canning salt
- 2 cups sugar
- 8 tsp mustard seed
- 4 tsp celery seed
Equipment
- Boiling-water canner
- Canning jars Three to four pint jars
Directions
- Prepare hot pint jars and lids. To peel onions, dip a few at a time in boiling water for 30 seconds, then cold water for 30 seconds. Trim 1/16 inch from each end and remove the peel.
- Combine vinegar, water, salt, and sugar in an 8-quart pot. Boil gently 3 minutes. Add onions, return to a boil, reduce heat, and simmer until half-cooked, about 5 minutes.
- Place 2 teaspoons mustard seed and 1 teaspoon celery seed in each hot pint jar. Fill with onions, leaving 1-inch headspace; cover with hot liquid, leaving 1/2-inch headspace. Remove bubbles, adjust headspace, wipe rims, and apply lids.
- Process pints in a boiling-water canner for 10 minutes at 0–1,000 ft, 15 minutes at 1,001–6,000 ft, or 20 minutes above 6,000 ft. Cool 12 to 24 hours and check seals.
- For best flavor, let processed jars stand 3 to 5 days before serving.
Recipe Notes
Private Notes
Questions or results?
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Tried this recipe?
Share your results how it turned out.Serving suggestions
After opening, refrigerate the product and use it in ways appropriate to this recipe.
Frequently asked questions
Can I change the recipe?
Do not change safety-critical proportions, jar size, headspace,
What if a jar does not seal?
Follow the cited source’s directions for an unsealed jar; refrigerate promptly when required.
Comparison and context
A tested NCHFP boiling-water
Troubleshooting
For best flavor, let processed jars stand 3 to 5 days before serving.
Source & provenance
Garden planning for this recipe
Plant, space, variety, zone, and timing estimates live on dedicated ingredient pages:
Typical canning season
Season: Summer, Fall
Months: August, September, October
How much of the main ingredient should I grow?
25–50 lb of Tree fruit per person per year
This is an annual planning range that includes preserving and typical fresh use. Plant, row-foot, and square-foot estimates are shown only when compatible cited yield or spacing data is available.
Garden yields vary by cultivar, climate, soil, pests, and care. Always measure the exact prepared ingredient amount required by the tested canning recipe.

