Purple hull peas are a quintessential staple of Southern summer harvests. These cowpeas, cousins to the black-eyed pea, are prized for their creamy texture and the distinct, deep-colored “liquor” they produce when cooked. However, the season for fresh purple hull peas is fleeting, often lasting only a few weeks in the heat of mid-summer. Learning how to freeze purple hull peas properly is the best way to lock in that summer-fresh flavor, ensuring you have a steady supply for New Year’s Day luck or comforting Sunday dinners in the dead of winter.
Understanding the Purple Hull Pea
Before diving into the preservation process, it is helpful to understand what makes these peas unique. Unlike garden peas, purple hull peas are field peas. They grow in long, green pods that turn a vibrant, deep purple as they reach maturity. When you crack open a mature pod, the peas inside are usually a pale green or creamy white with a small pink or purple “eye.”
The window for picking is crucial. If you pick them too early, the peas are small and lack starch; too late, and they become “shellies” or dried peas. For freezing, you want peas that are fully formed but still tender.
Preparation: The Art of Shelling and Sorting
The journey from garden to freezer begins with preparation. You cannot simply toss pods into a bag and expect good results. The shells of purple hull peas are fibrous and will become tough and bitter if frozen whole.
Shelling the Peas
Shelling is often a social event, traditionally done on a porch with a bucket in hand. To shell a purple hull pea, grip the pod at the stem end. Many varieties have a “string” you can pull down the seam. Use your thumb to pop the seam open and run it down the length of the pod, dropping the peas into a large bowl.
If you are dealing with a massive harvest, you might consider a mechanical pea sheller. These machines use rollers to squeeze the peas out of the pods quickly, though they can sometimes bruise the delicate skins of the peas.
Sorting and Cleaning
Once shelled, you must sort through your harvest. Remove any “zipper” bits of pod, stems, or leaves that fell into the bowl. Discard any peas that are shriveled, moldy, or excessively tiny.
After sorting, place the peas in a colander and rinse them thoroughly under cold running water. This removes dirt, dust, and any residual “milk” from the shelling process.
The Importance of Blanching
A common question among home preservers is whether you can skip the blanching step. While you can freeze raw peas, it is highly discouraged. Blanching—the process of briefly boiling vegetables and then plunging them into ice water—is essential for three reasons:
- Enzyme Inactivation: Vegetables contain enzymes that continue to ripen and eventually decay the plant matter even after harvest. Freezing slows this process, but only blanching stops it entirely. Without blanching, frozen purple hull peas will lose their color, develop a “hay-like” flavor, and become unpleasantly tough over several months.
- Color Preservation: Blanching sets the vibrant green and creamy white colors of the peas, preventing them from turning a dull grey-brown in the freezer.
- Surface Cleaning: The boiling water provides a final kill-step for any lingering bacteria or soil organisms on the surface of the peas.
A Step-by-Step Guide to Blanching Purple Hull Peas
To do this correctly, you will need a large stockpot, a large bowl for an ice bath, a slotted spoon or spider strainer, and clean kitchen towels.
The Boiling Phase
Fill your stockpot about two-thirds full of water and bring it to a rolling boil. Do not add salt to the blanching water. While salt enhances flavor during cooking, adding it during blanching can toughen the skins of the peas during long-term storage.
Once the water is boiling, add the peas in batches. Do not overcrowd the pot; you want the water to return to a boil as quickly as possible. A good rule of thumb is one pound of peas per gallon of boiling water.
Timing the Blanch
Start your timer as soon as the water returns to a boil. For purple hull peas, the magic number is 2 minutes. This is just enough time to heat the peas through and stop enzyme activity without actually “cooking” them.
The Shock Phase
While the peas are boiling, prepare your ice bath. Fill a large bowl with cold water and plenty of ice cubes. When the 2-minute timer goes off, immediately remove the peas using a slotted spoon and submerge them in the ice water.
The peas should stay in the ice bath for the same amount of time they were boiled—2 minutes. This “shocks” the peas, stopping the cooking process instantly so they don’t become mushy.
Drying and Packing for the Freezer
Moisture is the enemy of frozen food. If you pack wet peas into a bag, they will freeze into a solid, unmanageable block. Furthermore, excess water creates large ice crystals that can rupture the cell walls of the peas, ruining their texture.
The Drying Process
Drain the cooled peas thoroughly in a colander. For the best results, spread the peas out in a single layer on clean, lint-free kitchen towels or layers of paper towels. Gently pat them dry. Some enthusiasts even use a salad spinner to whirl away excess moisture before spreading them on towels.
Packaging Options
You have two primary options for packaging:
- Vacuum Sealing: This is the gold standard. Removing all air prevents freezer burn and keeps the peas fresh for up to 18 to 24 months.
- Freezer Bags: If using standard zip-top freezer bags, ensure you use the “heavy-duty” variety. Squeeze out as much air as possible before sealing. A helpful trick is to insert a straw into a small opening in the seal, suck out the remaining air, and then quickly close the bag.
The Flash Freeze Method
If you want the convenience of being able to pour out just a cup of peas at a time, use the flash freeze method. Spread the dried, blanched peas on a rimmed baking sheet in a single layer. Place the sheet in the freezer for 1 to 2 hours until the peas are frozen solid individually. Then, transfer them into your storage bags. They will remain loose and “pourable.”
Storage and Shelf Life
Label every bag with the date and the contents. It is easy to confuse purple hull peas with crowders or black-eyed peas once they are frozen.
When stored in a standard freezer at 0 degrees Fahrenheit, blanched purple hull peas will maintain peak quality for 8 to 12 months. If you use a deep chest freezer that maintains a consistent temperature and a vacuum sealer, they can last significantly longer without a noticeable loss in flavor.
How to Cook Frozen Purple Hull Peas
When you are ready to enjoy your harvest, there is no need to thaw the peas first. You can drop the frozen peas directly into a pot of simmering liquid.
Traditional Southern preparation involves simmering the peas with a piece of seasoned meat—such as salt pork, fatback, or a ham hock—along with a bit of chopped onion and perhaps a cloves of garlic. Cover the peas with water or chicken stock and simmer for 45 to 60 minutes until tender. Because they were blanched, they may cook slightly faster than fresh-shelled peas.
Common Mistakes to Avoid
One of the most frequent errors is under-blanching. If the center of the pea doesn’t reach the required temperature, the enzymes will continue to work, leading to a sour taste after a few months.
Another mistake is using containers that are not freezer-safe. Glass jars can crack if the peas expand slightly, and thin sandwich bags will allow air to permeate, leading to freezer burn within weeks. Always use materials specifically labeled for freezer use.
Finally, avoid freezing too many peas at once in a single bag. If the bag is too thick, the center will freeze too slowly, which can affect the safety and quality of the peas. Aim for flat, thin packages that freeze quickly and stack easily.
Frequently Asked Questions
What happens if I don’t blanch the peas before freezing?
If you skip blanching, the natural enzymes in the purple hull peas will stay active. Over time, these enzymes will cause the peas to lose their flavor, turn a dull color, and develop a tough, woody texture. While they may still be safe to eat for a short period, the quality will be significantly lower than blanched peas.
Can I freeze purple hull peas in the shell?
It is not recommended. The shells are bulky and take up valuable freezer space, but more importantly, they do not protect the pea well in the freezer. The shells will become mushy and difficult to remove once thawed, and you will miss the opportunity to blanch the peas effectively.
How do I know if my frozen peas have gone bad?
Look for signs of freezer burn, such as white, dried-out patches on the surface of the peas or an abundance of ice crystals inside the bag. If the peas have a fermented or “off” smell when you open the bag, or if they have turned a dark, slimy grey, they should be discarded.
Do I need to thaw the peas before cooking them?
No, you should cook purple hull peas directly from their frozen state. Thawing them can result in a mushy texture. Simply add the frozen peas to your boiling water or seasoned broth and adjust your cooking time by a few extra minutes to account for the temperature drop.
Can I use a pressure canner instead of freezing?
Yes, purple hull peas can be preserved through pressure canning. However, because they are a low-acid food, they must be processed in a pressure canner to prevent botulism; a water-bath canner is not safe. Freezing is generally preferred by many because it better preserves the fresh texture and bright color of the peas compared to the high-heat environment of a canner.