Blackberry peach freezer jam combines the sweet, juicy flavor of ripe peaches with the tartness of fresh blackberries for a vibrant, naturally colorful spread. This no-cook or minimal-cook jam preserves the bright, fresh fruit taste and is perfect for enjoying year-round without the fuss of traditional canning. It’s quick to make, requires minimal equipment, and stays fresh in the freezer for months.
Ingredients
- 3 cups fresh blackberries (about 1 pint)
- 3 cups peeled, diced fresh peaches (about 3 medium peaches)
- 4 cups granulated sugar
- 1/4 cup fresh lemon juice (about 2 lemons)
- 1 (1.75 oz) package fruit pectin powder (specifically for freezer jam, e.g., Sure-Jell)
- Optional: 1/2 teaspoon vanilla extract or cinnamon for added flavor
Instructions
- Prepare the fruit: Rinse the blackberries gently under cold water and drain well. Peel the peaches by blanching them in boiling water for 30 seconds, then transferring immediately to ice water; the skins will slip off easily. Dice the peeled peaches into small pieces.
- Mash the fruit: In a large mixing bowl, combine the blackberries and diced peaches. Use a potato masher or fork to crush the fruit until you have about 4 1/2 cups of mashed fruit. Some chunks are okay for texture.
- Add pectin: Stir the fruit pectin powder into the mashed fruit thoroughly. Let the mixture sit for 10 minutes to allow the pectin to dissolve and activate.
- Add sugar and lemon juice: Stir in the granulated sugar and fresh lemon juice until completely dissolved. If desired, add vanilla extract or cinnamon here for extra flavor. Let the mixture stand for 10 minutes, stirring occasionally.
- Cook the jam: Transfer the fruit mixture to a large saucepan and bring to a boil over medium-high heat, stirring constantly to prevent scorching. Boil hard for 1 minute, then remove from heat. This brief cooking helps dissolve sugar and activates the pectin fully.
- Jar the jam: Ladle the hot jam into clean, sterilized half-pint or pint freezer-safe containers or jars, leaving about 1/2 inch headspace. Wipe rims clean and seal with lids. Label with date.
- Cool and freeze: Let the jars cool at room temperature for 24 hours. The jam will thicken as it cools. Store in the freezer for up to 1 year.
- Thaw before use: When ready to enjoy, thaw jam in the refrigerator overnight. Use within 3 weeks after thawing.
Tips
- Fruit ripeness matters: Use fully ripe, flavorful blackberries and peaches for the best taste and natural sweetness. Avoid overly soft or underripe fruit.
- Substitutions: If peaches aren’t in season, try nectarines or apricots as a similar stone fruit substitute. For blackberries, fresh or frozen (thawed and drained) can work, but fresh is preferred for texture.
- Use freezer-safe containers: Choose plastic containers or glass jars labeled freezer-safe to prevent cracking or breaking when frozen.
- Don’t skip lemon juice: Lemon juice is essential for proper pectin activation and acidity balance, which ensures the jam gels and preserves safely.
Serving Suggestions
This blackberry peach freezer jam is incredibly versatile. Spread it generously on warm toast, English muffins, or freshly baked biscuits for a bright, fruity breakfast. It also pairs beautifully with yogurt or oatmeal for a naturally sweet topping. Use it as a glaze over grilled chicken or pork for a subtle fruity tang, or swirl into cream cheese for a quick fruit spread perfect for bagels or crackers.
Variations
You can customize this recipe easily to suit your taste or use what you have on hand. For a berry blend, try mixing blackberries with raspberries or blueberries. Adding a splash of bourbon or vanilla extract after cooking can deepen the flavor profile. For a spiced version, stir in cinnamon, nutmeg, or ground ginger. To reduce sweetness, cut back on sugar slightly but keep the lemon juice and pectin consistent for proper setting.
Storage and Reheating
Store the jam in the freezer for up to 1 year to maintain optimal quality. Once thawed in the refrigerator, keep it refrigerated and use within 3 weeks. Avoid refreezing thawed jam to preserve texture and flavor. The jam does not require reheating before serving; simply allow it to come to room temperature or spread it cold as preferred.
Frequently Asked Questions
Can I use frozen fruit for this freezer jam?
Yes, you can use frozen blackberries and peaches if fresh fruit isn’t available. Thaw the fruit completely and drain any excess liquid before mashing. Keep in mind the texture may be softer, and the jam might be less chunky.
What type of pectin should I use?
Use fruit pectin powder labeled specifically for freezer jam, such as Sure-Jell freezer pectin. Regular pectin for boiling water canning is not recommended because freezer jam relies on less heat and a different gel setting process.
Why is lemon juice important in this recipe?
Lemon juice provides the acidity needed to activate the pectin properly and helps prevent spoilage by lowering pH. It also brightens the flavor, balancing the sweetness of the sugar and fruit.
Can I reduce the sugar in this recipe?
Freezer jam requires sugar to gel correctly and preserve the fruit. Reducing sugar significantly can result in runny jam and shorter shelf life. You can reduce sugar by up to 25%, but expect a softer set and shorter freezer storage.
How do I know when the jam has set?
Freezer jam thickens as it cools in the refrigerator or freezer. It will be slightly softer than cooked jam but should hold its shape when spread. If it’s too runny after cooling, it may need more pectin or less sugar next time.
Is freezer jam safe without cooking it?
Freezer jam requires minimal cooking (usually a brief boil) to dissolve sugar and activate pectin. It’s stored frozen to prevent spoilage. Unlike traditional canned jam, it’s not shelf-stable and must be kept in the freezer until use.
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