Replies

It’s possible.. They do sell frozen PB&J sandwiches (uncrustables), peanut butter cookie dough, desserts, etc.
This is what I found searching:

Can You Freeze Peanut Butter?

Peanut butter can be frozen, provided that a few simple precautions are followed to insure the continued viability of the product.

Freezing is Possible
Freezing of peanut butter is possible to extend the shelf life, provided that the container is sealed air tight. Because of the oils in peanut butter, the shelf life of the product naturally is quite long when stored at room temperature and freezing is generally not recommended.

Oil Will Separate
The primary concern with freezing peanut butter is that the oil will separate when thawed. Although the appearance and texture of the peanut butter will be affected by this separation, the product is still safe to eat.

Storage at Room Temperature
Peanut butter may be stored for extended periods of time at room temperature without any harm befalling the product. Most products will remain viable for at least a year if stored at room temperature. According to Peter Pan Peanut Butter, the shelf-life of its product is 18 months.

Refrigerate Rather Than Freeze
For locations where the room temperature will be warm, it is recommended that peanut butter be refrigerated. Refrigeration will also maintain the flavor of the product. However, refrigerated peanut butter will be more difficult to spread.

Jif Peanut Butter’s web site recommends that any of its product that is not eaten within the first three month’s of opening, should be refrigerated to retain the best flavor. Neither Jif nor Peter Pan recommend freezing peanut butter.

Keep Tightly Sealed
Exposure to air and heat will have a negative impact on peanut butter. For that reason it is best to keep the container tightly sealed.

http://www.ehow.com/facts_5776094_can-freeze-peanut-butter_.html

What Happens When You Freeze Peanut Butter?
In general, peanut butter has a shelf life of about 18 months when stored at room temperature. However, that shelf life can be extended by freezing the peanut butter. Freezing peanut butter can have some side effects that may undesirable, including decreased spreadability, freezer burn and oil separation.

Decreased Spreadability
As peanut butter gets cold, the product firms up and becomes much more difficult to remove from the jar, let alone spread over a piece of warm toast. Bear in mind that after removing frozen peanut butter from the fridge, you will need to either warm the product in the microwave or allow it to return slowly to room temperature in order to ensure maximum spreadability.

Oil Separation
As peanut butter freezes, some separation of oils can occur. While this can be a bit off-putting for people unfamiliar with similar phenomena occurring in all-natural peanut butter, this separation of oil from the product does not impair safety of the product. Vigorous stirring with or without heat can help to reconstitute the peanut butter spread after the oils have separated due to freezing.

Crystallization
If not tightly sealed, moisture in the air of the packaging can freeze, causing the formation of ice crystals or freezer burn. To minimize the formation of ice crystals, you may want to spoon the peanut butter from its original jar into plastic freezer bags, pressing all the air out before sealing them up.

Possible Effects on Flavor
The manufacturers of Peter Pan brand peanut butter suggest that storing peanut butter in the fridge in very warm climates can help to maintain the product’s optimum flavor more effectively than keeping it at room temperature. However, they do not state whether freezing peanut butter can have similar flavor-retaining properties, so you may want to compare the taste of peanut butter kept at room temperature, the fridge and the freezer to see which you prefer. However, it is worth noting that the makers of Peter Pan peanut butter do not recommend freezing their product as a general rule.

Freezing Foods With Peanut Butter
Foods that contain peanut butter, such as cookies or snack bars, are usually okay to freeze, and some notable jelly makers have branched out into the frozen PB&J sandwich market. In addition, some desserts containing peanut butter are designed to be frozen, such as frozen peanut butter pie or Martha Stewart’s frozen peanut butter and chocolate sandwiches.

http://www.ehow.com/info_8071986_happens-freeze-peanut-butter.html