Classic Strawberry Jam — Ball

Tested source

This page follows Ball’s Classic Strawberry Jam. Keep the tested proportions, jar size, headspace, and altitude-adjusted processing schedule.

Preparation timeline

1. Prepare: Set up the boiling-water canner, keep jars hot, wash lids, and set bands aside.
2. Combine: Put crushed strawberries and bottled lemon juice in a 6- or 8-quart saucepan; gradually stir in pectin.
3. Cook: Bring to a full rolling boil, add all the sugar, return to a full rolling boil, and boil hard for 1 minute while stirring constantly.
4. Fill: Ladle into hot half-pint jars, leave 1/4-inch headspace, remove bubbles, wipe rims, and apply lids and bands fingertip-tight.
5. Process: Process for the altitude-adjusted time below. Turn off heat, remove the canner lid, and wait 5 minutes.
6. Cool: Remove jars and leave undisturbed for 12 to 24 hours before checking seals.

Equipment

• Boiling-water canner with rack
• Eight half-pint canning jars, lids, and bands
• 6- or 8-quart saucepan
• Potato masher or similar strawberry-crushing tool
• Measuring cups and spoons
• Long-handled spoon
• Canning funnel and jar lifter
• Bubble remover or headspace tool
• Clean damp cloth and timer

Visual method guide

1. Prepare: Heat the canner and jars; wash lids.
2. Combine: Mix crushed berries, bottled lemon juice, and pectin.
3. Cook: Reach a full rolling boil, add sugar, then boil hard for 1 minute.
4. Fill: Leave 1/4-inch headspace and apply lids fingertip-tight.
5. Process: Boiling-water process for the time required at your altitude.
6. Cool and check: Wait 12 to 24 hours, then confirm the seals.

Safety essentials

• Use bottled lemon juice and Ball RealFruit Classic Pectin in the stated amounts.
• Use half-pint jars and leave 1/4-inch headspace.
• Start timing only after the water returns to a full boil, and keep jars covered by water during processing.
• Apply the full altitude adjustment—do not use the 10-minute sea-level time above 1,000 feet.
• Refrigerate any jar that does not seal; do not store it at room temperature.

Steam-canner note: The primary tested method on this page is boiling-water canning. An atmospheric steam canner is an optional alternative only when used exactly according to current NCHFP steam-canner guidance, including altitude adjustments and the 45-minute maximum total process time.

About this recipe

This is a full-sugar, pectin-set strawberry jam from Ball. The tested batch uses 5 cups crushed strawberries, 1/4 cup bottled lemon juice, 6 tablespoons classic pectin, and 7 cups sugar, yielding about eight half-pints.

Before you begin

Review the complete source and recipe card.

Serving and storage

Serve on toast, biscuits, yogurt, oatmeal, or as a cake filling. Label sealed jars with the date and store them in a cool, dark, dry place. Refrigerate after opening.

Frequently asked questions

Can I use fresh lemon juice?

Use bottled lemon juice for this tested formula because its acidity is standardized.

Can I reduce the sugar?

Not in this recipe. Sugar and classic pectin work together for the intended set; choose a tested low- or no-sugar recipe instead.

Can I use pint jars?

No. Ball specifies half-pint jars for this recipe, and a larger jar does not have a tested processing schedule here.

What if a jar does not seal?

Refrigerate it promptly and treat it as refrigerated jam. Do not store an unsealed jar at room temperature.

What makes this version different

This is the classic full-sugar Ball formula using standard powdered pectin. It is not interchangeable with freezer jam, no-pectin jam, or low-sugar pectin recipes; each uses different proportions and directions.

Troubleshooting

Jam seems soft

Let sealed jars stand undisturbed for 12 to 24 hours before judging the set. Do not reprocess or add ingredients by guesswork; refrigerate or freeze a soft batch unless you follow a tested remake procedure.

Jam scorched

Use a 6- or 8-quart saucepan and stir constantly once the mixture reaches a boil. Discard a scorched batch rather than canning it.

Too much foam

Remove the pan from heat and skim foam before filling, as Ball directs.

Fruit floated

This is generally a quality issue. Crush the berries evenly and distribute fruit and syrup consistently among the jars.

A jar did not seal

Refrigerate it promptly. Never place an unsealed jar on the shelf.

Source & provenance

Official source.

Related resources

Canning safety · Browse home-canning recipes · Sources and trust