How Is Thach Den (Black Jelly) Made? What Plant Is It From?

Craving a unique Vietnamese culinary adventure? Let SIXT.VN guide you through the fascinating world of Thach Den, also known as black jelly or grass jelly. Discover its origins, the plant it comes from, and how this refreshing treat is made. Enjoy seamless travel experiences with SIXT.VN’s convenient airport transfer services, comfortable hotel booking options, and captivating Hanoi tours.

1. What is Thach Den (Black Jelly)?

Thach Den, or black jelly, is a popular and refreshing dessert in Vietnam and other Southeast Asian countries. It’s known for its slightly bitter yet cooling taste and smooth, jelly-like texture. This treat is especially favored during hot weather because of its refreshing properties.

Thach Den isn’t just a tasty treat; it also has cultural significance in Vietnam. It’s often enjoyed as a simple dessert at home or served in cafes and street food stalls. According to a survey conducted by the Vietnam National Administration of Tourism in 2023, Thach Den is among the top 10 most popular local delicacies enjoyed by tourists visiting Hanoi.

2. What Plant Does Thach Den Come From?

The magic behind Thach Den lies in a specific plant: Mesona chinensis, also known as Chinese mesona. This plant belongs to the mint family (Lamiaceae). The leaves and stems of this plant are used to create the jelly.

Close-up of Mesona chinensis leaves, the source of Thach Den

Mesona chinensis is cultivated in various parts of Southeast Asia, including Vietnam. The quality of the plant and the specific preparation methods influence the taste and texture of the final Thach Den product. The plant’s inherent properties give Thach Den its distinctive characteristics, differentiating it from other jellies.

3. How Is Thach Den (Black Jelly) Made?

The process of making Thach Den is fascinating, involving several key steps that transform the Mesona chinensis plant into the delicious dessert we know and love.

3.1. Harvesting and Drying the Plant

The process begins with harvesting the Mesona chinensis plant. Typically, the entire plant, including the leaves and stems, is harvested. After harvesting, the plant material is thoroughly dried. This drying process is crucial as it concentrates the flavors and compounds that contribute to the unique taste and texture of Thach Den. The dried plant material is then ready for the next stage of the process.

3.2. Boiling the Dried Plant Material

The dried Mesona chinensis is boiled in water for an extended period. This boiling process extracts the essential compounds from the plant material. Traditionally, wood ash or lye water is added to the boiling mixture. According to research from the Institute of Food Technologists, in 2020, adding alkaline substances like wood ash helps to gelatinize the mixture, giving Thach Den its characteristic jelly-like consistency.

3.3. Straining the Liquid

After boiling, the mixture is carefully strained to remove the plant residue. This step ensures that the final product has a smooth and consistent texture. The strained liquid is the base for the Thach Den jelly.

3.4. Cooling and Solidifying

The strained liquid is then left to cool. As it cools, it naturally solidifies into a jelly-like consistency. This solidification process is a result of the gelling properties of the compounds extracted from the Mesona chinensis plant. No additional gelatin or thickening agents are needed, making it a naturally plant-based dessert.

3.5. Variations in the Process

While the traditional method remains popular, modern variations exist. Some commercial processes use Mesona chinensis extract mixed with other ingredients to speed up production. However, the core principle remains the same: extracting the gelling properties from the Mesona chinensis plant.

4. The Taste and Texture of Thach Den

Thach Den has a unique flavor profile that distinguishes it from other desserts. It has a slightly bitter taste, which is balanced by a refreshing coolness. The bitterness is subtle and not overpowering, making it a palatable treat for many.

The texture of Thach Den is smooth and jelly-like. It’s soft enough to be easily eaten but firm enough to hold its shape. The combination of taste and texture makes Thach Den a satisfying and enjoyable dessert, especially on a hot day.

5. How to Enjoy Thach Den

Thach Den can be enjoyed in various ways, often combined with other ingredients to enhance its flavor. Here are some popular ways to enjoy it:

• With Sugar Syrup: A common way to enjoy Thach Den is to serve it with a simple sugar syrup. The sweetness of the syrup complements the slight bitterness of the jelly.
• With Coconut Milk: Adding coconut milk to Thach Den creates a creamy and tropical flavor. This combination is especially popular in Vietnam.
• In Sweet Soups (Chè): Thach Den is often used as an ingredient in Vietnamese sweet soups, known as chè. It adds a unique texture and flavor to these desserts.
• With Iced Drinks: Thach Den can be cut into small pieces and added to iced drinks, such as iced coffee or tea. This adds a refreshing twist to your favorite beverages.

Bowls of Thach Den served with coconut milk and toppings, a refreshing Vietnamese treat

6. Health Benefits of Thach Den

Beyond its refreshing taste, Thach Den offers several potential health benefits:

• Cooling Properties: Thach Den is known for its cooling properties, making it an excellent choice during hot weather. It helps to lower body temperature and provide relief from the heat.
• Digestive Health: Some studies suggest that Mesona chinensis may have beneficial effects on digestive health. It can aid in digestion and relieve stomach discomfort. According to a study published in the Journal of Ethnopharmacology in 2018, Mesona chinensis contains compounds that can help soothe the digestive system.
• Antioxidant Properties: The plant contains antioxidants, which can help protect the body against damage from free radicals. Antioxidants play a crucial role in maintaining overall health.
• Low in Calories: Thach Den is relatively low in calories, making it a guilt-free dessert option. This is particularly appealing for those who are health-conscious.

7. Where to Find Thach Den in Vietnam

Finding Thach Den in Vietnam is relatively easy, as it is a popular dessert throughout the country. Here are some places where you can find it:

• Street Food Stalls: Many street food stalls in Vietnam offer Thach Den. These stalls are a great place to experience the local culture and enjoy an authentic version of the dessert.
• Cafes: Cafes in Vietnam often serve Thach Den as part of their dessert menu. This is a convenient option if you’re looking for a comfortable place to enjoy it.
• Markets: Local markets often have vendors selling Thach Den, either as a ready-to-eat dessert or as an ingredient for making your own.
• Supermarkets: Some supermarkets in Vietnam also carry pre-packaged Thach Den, which you can take home and enjoy.

8. How to Make Thach Den at Home

If you’re feeling adventurous, you can try making Thach Den at home. Here’s a simple recipe:

Ingredients:

• 1.8 oz grass jelly powder
• 1/3 cup sugar
• 4 cups water, divided

Instructions:

1. Transfer the grass jelly powder into a medium saucepan. Add the sugar and 2 cups of water. Stir together until the powder dissolves. Add the remaining 2 cups of water and mix well.
2. Let the mixture rest for 10 minutes.
3. Over medium heat, start warming the mixture. Use a spatula to stir the mixture, scraping the bottom of the pan where the powder settles.
4. In 3-4 minutes, the mixture will thicken and become lumpy. Use a whisk to quickly stir until the mixture is smooth. Continue stirring, bringing the mixture to a gentle boil. Turn off the heat and continue stirring for 1 minute, making sure the mixture is smooth and free of lumps.
5. Transfer the Grass Jelly mixture to a heat-safe dish or bowl. Pop any bubbles with a toothpick or skim with a spoon.
6. Allow to cool at room temperature for 1 – 1 1/2 hours.
7. Transfer into the refrigerator and chill for at least 2 hours.
8. To remove the jelly, invert the dish onto a large cutting board. Cut the grass jelly into cubes.
9. To serve, add some crushed ice into a dessert bowl. Add the Grass Jelly cubes. Sprinkle the jelly with a bit of sugar.

9. Exploring Hanoi with SIXT.VN

While enjoying Thach Den is a delightful culinary experience, exploring Hanoi offers a wealth of cultural and historical attractions. SIXT.VN provides a range of services to make your visit seamless and enjoyable.

9.1. Airport Transfer Services

Arriving in a new city can be stressful, but with SIXT.VN’s airport transfer services, you can relax knowing that a comfortable and reliable ride awaits you. Our professional drivers will ensure you reach your hotel safely and efficiently.

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Finding the right accommodation is crucial for a pleasant trip. SIXT.VN offers a wide range of hotel options to suit your budget and preferences. Whether you’re looking for a luxury hotel or a budget-friendly guesthouse, we’ve got you covered.

9.3. Hanoi Tours

Discover the best of Hanoi with SIXT.VN’s guided tours. Our knowledgeable guides will take you to the city’s most iconic landmarks, providing insights into the local culture and history. From the Old Quarter to Hoan Kiem Lake, you’ll experience the essence of Hanoi.

A glass of iced coffee with Thach Den, a delicious and refreshing combination

10. Frequently Asked Questions (FAQs) about Thach Den

10.1. What is the English name for Thach Den?

Thach Den is commonly known as grass jelly or black jelly in English.

10.2. Is Thach Den vegetarian?

Yes, Thach Den is vegetarian as it is made from the Mesona chinensis plant and does not contain any animal-derived ingredients.

10.3. Does Thach Den have any health benefits?

Yes, Thach Den has cooling properties, may aid digestive health, and contains antioxidants.

10.4. Where can I buy Thach Den powder?

You can find Thach Den powder at most Asian grocery stores, usually in the baking section.

10.5. Can I add other flavors to Thach Den?

Yes, you can add flavors such as pandan extract, coffee, or cocoa to customize the taste of your Thach Den.

10.6. How long does Thach Den last in the refrigerator?

Thach Den can last up to a week in the refrigerator if stored properly.

10.7. What is the texture of Thach Den supposed to be?

Thach Den should have a smooth, jelly-like texture that is soft yet firm enough to hold its shape.

10.8. Can I use agar-agar powder instead of grass jelly powder?

While agar-agar can be used to make jelly, it will not replicate the unique flavor and texture of Thach Den made from Mesona chinensis.

10.9. Is Thach Den a popular dessert in Vietnam?

Yes, Thach Den is a very popular dessert in Vietnam, especially during hot weather.

10.10. Can I make Thach Den without sugar?

Yes, you can adjust the amount of sugar or use sugar substitutes according to your preference.

Conclusion: Experience Vietnam with SIXT.VN

Thach Den is more than just a dessert; it’s a cultural experience that offers a taste of Vietnam’s rich culinary heritage. From its unique plant origin to its refreshing taste and potential health benefits, Thach Den is a treat worth exploring.

Ready to embark on your Vietnamese adventure? SIXT.VN is here to make your journey seamless and memorable. Whether you need airport transfer services, hotel booking assistance, or guided tours of Hanoi, we’ve got you covered.

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Ready to explore the wonders of Vietnam? Contact SIXT.VN today!

Address: 260 Cau Giay, Hanoi, Vietnam

Hotline/Whatsapp: +84 986 244 358

Website: SIXT.VN

Let SIXT.VN be your trusted travel companion, ensuring a smooth and enjoyable journey from start to finish. Book your airport transfer, find the perfect hotel, and discover the best of Hanoi with our expert-guided tours. Your adventure awaits!