Yes, you absolutely can make freezer jam in glass jars. Based on the provided reference, using good, old-fashioned Mason jars is a perfectly acceptable method for storing jam in the freezer.
While there are specialized plastic containers designed for freezer jam, they are not mandatory. You can repurpose sealable plastic containers or opt for traditional glass jars like Mason jars.
Using Glass Jars for Freezer Jam
Using glass jars for freezer jam is a popular and effective method. It allows you to store homemade jam safely in the freezer for later use.
Here's why glass jars are a good choice and some tips for using them:
- Accessibility: Many people already have Mason jars or other glass jars suitable for food storage.
- Reusability: Glass jars are durable and can be washed and reused multiple times.
- Reference Confirmation: As highlighted by the reference, "you can use good, old-fashioned Mason jars" for storing jam in the freezer.
Tips for Freezing Jam in Glass Jars
To successfully freeze jam in glass jars and prevent breakage, consider these tips:
- Choose the Right Jars: Use jars specifically designed for canning or freezing. Look for jars with straight sides or shoulders that aren't too pronounced, as this shape helps the jam expand slightly during freezing without cracking the glass.
- Leave Headspace: This is crucial. Jam, like other liquids, expands when frozen. Leave adequate headspace at the top of the jar – typically about 1/2 inch for pint jars and 3/4 inch for quart jars. This gives the jam room to expand.
- Cool Jam Completely: Ensure your jam is completely cooled to room temperature before placing it in the freezer. Freezing warm jam can cause thermal shock and crack the glass.
- Tighten Lids: Securely tighten the lids to create a good seal.
- Avoid Crowding: When first placing jars in the freezer, avoid having them touch each other tightly until they are fully frozen. This allows for better air circulation and even freezing.
- Handle Gently: Glass is fragile. Handle frozen jars with care.
Glass Jars vs. Plastic Containers for Freezer Jam
Here's a simple comparison:
| Feature | Glass Jars | Plastic Containers (Freezer Specific) |
|---|---|---|
| Suitability | Yes, with proper headspace | Yes, often designed for expansion |
| Reusability | High, durable | High, but may stain/scratch |
| Environmental | Generally considered more sustainable | Can be reused, some recyclable |
| Availability | Common, widely available | Available, often specifically marketed |
| Expansion Risk | Higher risk if headspace is insufficient | Often designed to accommodate expansion |
Both options are viable for storing freezer jam, but using Mason jars is a classic and reliable choice as mentioned in the reference.
By following these simple guidelines, you can confidently store your delicious homemade freezer jam in glass jars.
