What is coconut yam? How to process coconut yam without it turning black

Coconut trunk vinegar, also known as tuba vinegar, is a popular ingredient used in many dishes, such as salads and stir-fries. Let's discover how to properly prepare coconut trunk vinegar without it turning black.

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is a rustic ingredient that can be processed into many delicious dishes such as shredded coconut salad with pig’s ears, coconut root stew, pickled coconut root… However, if you do not know how to process it properly, the coconut root can turn black and lose its taste. Here are some tips on how to prepare the coconut root without it turning black.

1What is coconut root (coconut stem)?

Coconut root, also known as coconut shoots, coconut stem, or coconut sprout, is the non-mature part that is located on top of the coconut tree trunk.

When harvesting, people have to select mature coconut trees, then climb up to remove all the leaves, flowers, and coconuts from the trees before cutting the coconut shoots.

These coconut shoots are then separated from the outer fibrous layer to reveal the white inner part, which is called the coconut root. The coconut root is crispy and has a mild sweet taste. Before starting to cook, people usually cut the coconut root into pieces or thin slices, then soak them in salted ice water or lemon juice to prevent them from turning brown and maintain their crispiness for a longer time.

Depending on personal preference, the coconut root can be cooked into various dishes such as salad, stir-fry, dried, or sautéed, each dish bringing the distinctive flavor of the coconut root: crispy, sweet, and refreshing.

Coconut root is the non-mature part that is located on top of the coconut tree trunkCoconut root is the non-mature part that is located on top of the coconut tree trunk

2How to prepare coconut root without it turning black

Coconut roots can easily turn brown during the cooking process, and here are some popular methods to solve this problem.

Soak in lemon water

One of the simple ways is to use lemon water. First, you cut the coconut root in half and then cut it into small pieces with a size of about 4 – 5 cm or thinly slice it. Then, soak them in a clean water basin and add prepared lemon juice, then soak the coconut root for about 15 minutes.

After 15 minutes, you can take out the coconut root and rinse it with cold water 2 – 3 times to remove excess lemon juice, then let it drain before cooking.

Besides, to increase the crispness, crunchiness, and whiteness of the coconut root, you can also soak them in ice water for an additional 10 minutes before using.

Soak in lemon waterSoak in lemon water

Soak coconut root in sugar vinegar

Soaking coconut root in diluted vinegar and sugar water is another way to prevent the coconut root from turning brown. First, you prepare the vinegar-sugar mixture by mixing 150 ml of vinegar, 200g of sugar, and 2 liters of water in a basin.

Then, cut the coconut root into small pieces and soak them in the vinegar-sugar mixture. Use plastic wrap to cover the basin, then place it in the refrigerator for 2 – 4 hours.

The soaking process in the vinegar-sugar mixture not only enhances the aroma but also makes the coconut root crunchier. Moreover, the cold temperature in the refrigerator helps the coconut root stay crispy, making the dish even more refreshing. After soaking, you can take it out of the refrigerator and prepare it according to your preferences.

Soak coconut root in sugar vinegarSoak coconut root in sugar vinegar

3How to store coconut root

Store coconut root at room temperature

If you have bought coconut root and not used it yet, you should keep the coconut root intact without washing it and store it in a clean, well-ventilated place.

Store coconut root at room temperatureStore coconut root at room temperature

Store coconut root in the refrigerator

If you have a refrigerator, you can put the whole coconut root in a sealed bag and place it in the refrigerator’s vegetable compartment. With this method, the coconut root can stay fresh for 3 to 5 days. If you store it in the freezer compartment, it can be stored for up to 10 days.

Store coconut root in the refrigeratorStore coconut root in the refrigerator

Soak in water

If you have cut the coconut root but haven’t used it immediately, you can soak the coconut root in a bowl of water. This method will help the coconut root stay moisturized and retain its crispness and sweetness.

Soak in waterSoak in water

Now you know what coconut root is and how to prepare it without it turning black, as well as how to store coconut root. Hopefully, this article has provided you with useful information.

Frequently asked questions

Coconut yam, or Dioscorea alata, is a type of yam that belongs to the Dioscoreaceae family. It is a tropical tuber crop and is known for its creamy texture and sweet taste. Coconut yam gets its name from its unique fragrance and flavor, which resembles that of coconut. It is different from other yams or sweet potatoes in terms of its distinct flavor, as well as its creamy and moist texture.

Coconut yam tends to turn black due to oxidation. This is a natural process that occurs when the yam is exposed to air, and the polyphenol oxidase enzyme present in the yam reacts with oxygen. The yam’s surface turns black, but it is still safe to consume.

To prevent coconut yam from turning black, you can follow these steps: Choose fresh yams with intact, unbruised skin. The fresher the yam, the better. Peel and cut the yam right before processing or cooking. The longer it is exposed to air, the higher the chances of oxidation. Submerge the peeled and cut yam in a solution of water and acidic agents like lemon juice or vinegar. This creates an acidic environment that inhibits oxidation. You can also boil the yam with acidic agents or steam it to minimize exposure to oxygen.

There are several methods to preserve coconut yam without it turning black: Quick boiling: Blanch the yam pieces in boiling water with a small amount of acidic agent for a few minutes. This deactivates the enzyme and sets the color. Freezing: After blanching, you can freeze the yam pieces in airtight containers or freezer bags. This preserves the yam for later use. Dehydration: Slice the yam thinly and dehydrate it in an oven or food dehydrator. The low moisture content inhibits oxidation. Canning: You can also can the yam by packing it in sterile jars with a brine solution and processing it in a pressure canner. This method preserves the yam for long-term storage.

Yes, it is still safe to eat. The black color is purely a result of oxidation and does not indicate spoilage. However, the texture and taste may be slightly affected, becoming softer and less sweet over time.