Hai Duong mung bean cake, or banh dau xanh Hai Duong, is a small, sweet confection with a fine, crumbly texture and a pronounced bean flavor. Try a traditional version with unsweetened tea first, then choose a larger gift box or a flavored version if you enjoy it.
The specialty still carries the Hai Duong name, even though the area is now part of Hai Phong. When shopping, look for that name and the full producer name on the packaging; a golden dragon logo alone does not identify one manufacturer.
What mung bean cake tastes like
The familiar cake is made with finely ground mung beans, sugar and fat, pressed into small pieces. It breaks into a soft, fine crumble rather than layers of flaky pastry. The sweetness, richness and aroma differ between producers and product lines.
Ingredients also vary. Some packaged versions use vegetable oil and vanilla flavoring, while other recipes have different fats or aromas. Read the exact label if you want to avoid a particular ingredient; the words “mung bean” or “traditional” are not a complete ingredient list.
Eat a small piece at a time over its wrapper or a plate. Unsweetened green tea or lotus tea provides a useful contrast to the sweetness. If you are buying for people who have never tried it, a small traditional pack is a practical starting point.
For a contrasting local sweet, Hai Phong Tours suggests comparing this crumbly confection with Ninh Giang banh gai, a chewy, leaf-wrapped steamed cake. Check the filling and storage instructions separately; the two products have different textures and handling needs.
Two producer names to recognize
Rong Vang Hoang Gia
Rong Vang Hoang Gia produces traditional mung bean cake alongside green-tea and durian varieties. Its range includes ordinary packs, mixed-flavor selections and more elaborate gift boxes, including bamboo packaging.
Choose by flavor and the amount of cake inside, as well as the presentation. A larger outer box does not necessarily contain more cake than a simpler pack, so compare the net weight and the number of inner portions.
Rong Vang Minh Ngoc
Rong Vang Minh Ngoc is a separate producer. Its A27 range includes traditional and matcha versions in 150-gram boxes with individually packed portions.
This format can be useful for sharing or opening gradually during a trip. Check the precise flavor, weight and ingredients on the box you select; packaging that looks similar may belong to a different product line.
Where to buy Hai Duong mung bean cake
Rong Vang Hoang Gia has two product showrooms in the former Hai Duong city area:
- 209C Tue Tinh Street — use the full street number, including the letter C, when arranging a stop.
- 9 Bach Dang Street — another showroom for the producer’s range.
Confirm opening hours and the gift box or flavor you want before making a special journey. A retail showroom visit does not automatically include a factory tour, demonstration or tasting.
You can also look in supermarket specialty sections and packaged-food shops at airports or highway rest stops. Availability differs by outlet, so check the producer name, sealed packaging and expiry date wherever you buy. For Minh Ngoc, ask for the full brand name rather than simply “Rong Vang,” which means Golden Dragon.
Choosing a box to take home
- For a first taste: choose a small traditional pack before committing to a large mixed box.
- For sharing: compare the number of individually wrapped portions and total net weight.
- For a formal gift: check the box’s condition and how much space its presentation packaging will take in your luggage.
- For a longer trip: choose a sealed pack with enough remaining shelf life for your journey and the recipient to use it.
If you have an allergy or follow a vegan or gluten-free diet, check the full ingredient and allergen information and ask the producer about anything unclear. Do not assume that every flavor or every brand has the same recipe.
Shelf life, storage and packing
Shelf life depends on the exact product, so use the manufacture and expiry dates printed on your pack. Compare the time remaining before expiry rather than assuming that every box of mung bean cake lasts the same number of months.
Follow the label’s storage directions. Keep packs in a cool, dry place away from direct sunlight and close the packaging after opening. Protect the box from crushing in your luggage; the cake’s delicate texture makes careful packing useful even when each portion is wrapped.
Keep the original labeled packaging when taking the cake overseas, and check your destination’s food-entry requirements before travel. A product being sold in an airport shop does not establish that it can be brought into every country.
For a useful souvenir, focus on the flavor, producer, intact packaging and remaining shelf life. You do not need an elaborate gift box to enjoy the familiar combination of Hai Duong mung bean cake and a cup of tea.